Lucas' obsession began the day he accidentally saw his older brother playing in a very special way with his friend. The little rabbit had gone to his brother's room to ask where his mother was, and there he had seen them: the two teenagers were stuck together, one behind the other, with their pants on the floor. Christian, Lucas's older brother, was wiggling his hips back and forth, bumping them hard against his friend's butt, a black cat of the same height who was moaning and begging for more as his legs shook. The sight frightened and caught the attention of the little leporid in equal parts, who watched intently for as long as he could until the two teenagers groaned, giving Lucas the signal that it would be best to retreat quietly before he was discovered.

Adding to the boy's great confusion was a basic sex education class they had at school, producing many more doubts as he related the new information to what he had seen. 

One morning, while brushing his teeth with his brother, little Lucas asked the teenager, "Is Kevin having your baby?"

The strange question made him spit out his toothpaste and blush all over as he watched his little brother not knowing what to say.

"Because last week you two were having sex, right?" the bunny tried to confirm.

"Yeah..." muttered the older brother.

"So you were sticking your penis in your friend's vagina," Lucas continued.

"No! No...Wait...Kevin doesn't have a vagina," Christian replied.

"Then what were you guys doing?" the younger brother asked again.

"Well...When you're older I'll explain it to you," said the teenager, trying to escape the conversation.

"Fine, then I'll ask dad," replied Luke after rinsing his mouth and walking out of the bathroom.

"No!" shouted the older brother, catching up to his little brother in the hallway and grabbing him by the shoulder.

"Are you going to explain?" asked the little rabbit, with a slightly wicked grin.

"Yes...But you must promise not to tell anyone about what I tell you," warned Christian.

"Okay...I promise for grandma's sake that she's in heaven," the younger brother replied.

Christian grabbed his face and growled, "Lucas, don't make promises for Grandma!"

"Sorry!" apologized the leporid, laughing as he covered his snout.

The teenager walked over to the stairs to look down, the house was silent, an indication that his parents had already left for work. Wasting no time, Christian took his little brother by the hand and led him up to his room, he closed the door behind them, sat Lucas on his bed and he sat down next to him.

"Look...Yes we were having sex with Kevin, but I was sticking my penis in his ass. That's how males have sex," the teen explained.

"So Kevin's not pregnant?" asked Lucas, somewhat confused.

"No...A male can't get another male pregnant. It's just sex for fun..." clarified Christian.

"And it feels good?" asked the little bunny again, this time a little embarrassed.

"Yes, it feels really good...Whenever we can we do it with Kevin," replied the teenager, thinking for a moment about the feline's delicious ass.

"They taught me in school that people who like each other a lot have sex," Lucas muttered.

"Well...that's not always the case, but most of the time that's true," the older brother explained.

"Christian, do you love me?" asked the little rabbit.

"Of course I love you! Even if you are adopted," said the teenager.

"I'm not adopted, you idiot!" protested the boy.

"Mom told me you were adopted," scoffed Christian, hugging his little brother.

"Mom told me you were adopted, jerk!" retorted Lucas, laughing as he punched his older brother in the ribs.

"I love you, little brother," the teen whispered.

"So will you have sex with me?" the little boy asked, a big grin plastered on his face.

"Lucas...We can't do that..." murmured Christian.

"Why not, I love you too, you're supposed to have sex with the people you love," argued the little boy.

"Yeah, but that rule doesn't include siblings. Besides, I'm five years older than you and it could cause me a lot of trouble," the teen explained.

"If that's the problem then don't worry, I won't tell anyone. It will be our brotherly secret," Lucas promised.

"I don't know how comfortable it will be for you either..." hesitated Christian, making a worried gesture at the sight of his brother's enthusiasm.

"Is it painful?" asked the boy.

"Maybe...Sometimes yes," the teen replied, trying to remember the first times they tried it with Kevin several years ago.

"But I want to do it with you..." moaned Lucas.

Christian thought for a moment about what he could do to please his little brother without actually hurting him. The first time with his feline friend had been at a birthday party when they were both eleven, it had been a fun and exciting experience, and he wanted his little brother to experience something similar.

"We could do something else. Look, get undressed," the older brother offered, starting to take off his t-shirt.

The boy nodded and bent down to detach his sneakers, blushing at the sight of his brother's naked torso. The difference between the two rabbits was noticeable, while the teenager had a flat abdomen and pecs that were already taking shape, the boy had a small belly and nipples that couldn't even be seen under the white fur on his chest.

After removing his footwear, Christian pulled down his pants and underwear, exposing his flaccid penis, which hung quietly between his legs along with his swollen testicles. This image was too much for little Lucas, who paused at the sight of the size of his brother's genitals, hesitating about whether he should continue undressing.

"What's wrong?" asked the teenager, seeing his little brother hesitate.

"You're huge down there, you've got it the same size as daddy..." moaned the little bunny, completely blushing.

Christian let out a giggle, hugged his little brother and gave him a kiss on the head, "Don't feel embarrassed, when you're my age you'll be the same size too, more or less," comforted the teenager to the little boy.

"Don't you dare to mock..." muttered Lucas and after saying this, he slowly pulled down his shorts and boxer shorts, allowing his older brother to see his small penis that had an extension similar to the teen's little finger, covering the boy's tiny, wrinkled scrotum of which the two balls inside couldn't even be noticed.

The teenage rabbit carefully picked up his brother's genitals with one hand and looked at them. "Wow...I don't remember mine being that big at your age. You're going to have a real cannon between your legs when you grow up, little brother," Christian assured.

"Really?" the boy asked.

"Yeah, look at all this skin, that means it has a lot of growing to do," explained the teenager, grabbing his brother's foreskin with two of his fingers and tugging on it.

"It's true, it's stretching a lot!" shouted Lucas in surprise.

"See? You're going to put all your friends to shame, little brother," promised the teenager.

"Do you like it?" the boy asked his brother.

"Hmm...It's not something I usually notice, I've always been top," Christian confessed, flashing back to his experiences with his feline friend and other boys.

"Top? What does that mean?" asked Lucas again, not understanding his brother's words.

"It means...It's hard to explain...It means I play the husband and the other guys play the wives," the older brother said, offering the first similarity that built in his head.

"So they're your wives but they don't get pregnant...Do you have a lot of wives, brother?" the boy asked, looking the other male straight in the eye, genuinely curious.

"Well...Yes, I have several wives," replied the teenager, somewhat uncomfortable with the conversation.

"Could I be your wife too?" ventured the younger brother.

"Lucas...No, not right now. But, if you do as I say, in a week's time we could try," Christian promised.

"'Anything! Tell me what I have to do!" the boy exclaimed, quite excited.

The teenager stood in front of his little brother, cupping the flaccid penises of both males with his hands, making the boy feel the warmth given off by his older brother's mature manhood.

"'It's asleep now, but when we start playing it will get quite a bit bigger and thicker," Christian explained.

Luke stood again observing the vast difference between them, the huge log of flesh next to his little stick, the abundant amount of pubic hair on his brother's lower abdomen, the toned body of the teenager, all of it sometimes made the boy think that he really had been adopted.

"Feels warm," the boy chuckled.

Christian laughed too, released his penis and reclined his little brother against the bed, lifted the little bunny's legs, exposing his anus, sucked his index finger and pushed it a few inches inside the boy.

"Ouch...N-No...Stop, please..." moaned Lucas, feeling an uncomfortable pain in his ass.

The teen withdrew his finger from his little brother's anus, "My cock has to go in there, all the way in. Do you understand why you can't be my wife now?" explained Christian again.

"Yes...What do I have to do to make it not hurt that much?" asked the boy, somewhat embarrassed by the strange experience he had just had.

"When you're alone, wet one of your fingers with saliva, stick it in and pull it out of your butt slowly until it doesn't hurt, and then do the same with two and three fingers. If you do this for a week, it won't hurt as much when I penetrate you...Or so Kevin told me, he had his little hole pretty tight when we started playing together," the older brother detailed.

"Fine...I'll do that," Lucas agreed.

"Kevin also told me that it feels really good to do it while you masturbate. So...if you want to try it..." added Christian.

"While I masturbate?" asked the boy, confused by that new word.

"Sure, you know..." said the teenager, gesturing with his hand, as if he was jerking a penis.

Lucas stared at his brother and, after a few seconds, shook his head.

"Perfect, I'm going to reveal to you the biggest secret of all males," Christian said, and sat back down next to his little brother, spreading his legs apart to better expose his penis.

The boy pricked up his ears with great curiosity, as he watched his brother very carefully, waiting for the great revelation he was about to witness.

"Grab your dick with your fingers and start moving it up and down," the teen explained, as he grabbed his own member with his hand and began to masturbate.

Lucas obeyed and, carefully, began jerking his small penis. "It tickles," said the boy, feeling his member slowly harden.

"Does that feel good?" asked Christian, trying to contain his laughter at the sight of the strange faces the other rabbit was making.

The little rabbit's toes contracted, "It feels so nice..." sighed the boy, not stopping to touch himself as his brother had instructed.

"Look how mine looks now," said the teenager.

"It got bigger!" exclaimed Lucas at the sight of the other rabbit's crotch.

"If you want you can touch it, all my wives can," Christian offered, snorting proudly at his erection.

The little bunny stopped masturbating for a moment, got off the bed, stood in front of his brother, and with his index finger touched the teen's glans, feeling how hard and wet it was.

"Are you peeing yourself?" asked Lucas, with a disgusted expression as he hurriedly dried his hand with the bed sheet as he felt his finger getting wet.

The teenager let out a laugh and said, "No, silly. That's called precum, when you grow up and masturbate it will come out of you too."

"It looks really gross, I don't want precum coming out of me," the little bunny moaned.

"Don't complain, you'll like it later. Do you want to do something I'm used to do with my other wives?" asked the big brother.

"Yes! Hmm...But...But...It doesn't hurt, does it?" replied the boy, rather hesitantly as he remembered how his brother had sunk one of his fingers into his anus.

"No, it doesn't hurt. You just have to sit back down and keep masturbating," Christian explained.

With no reason to distrust his brother, Lucas sat back down next to him and waited. The teen stood up and continued to masturbate, this time in front of his little brother, jerking harder and harder and stroking his own balls. The little rabbit tried to keep up with his big brother, his imposing presence and beautiful body giving him a strange feeling in his chest, making him gasp just as the teen was doing.

"Here it comes, don't move," Christian ordered.

"What's coming?" asked Lucas, not understanding the situation.

But before the teen could explain anything, a moan came out of his mouth and he began to ejaculate on his younger brother. Having aimed downward, four copious streams of warm semen landed on the other rabbit's belly and small genitals.

Instinctively, Lucas covered his face as he felt the hot white liquid drip onto his fur. When he opened his eyes, the boy watched as the thick liquid slowly dripped from his abdomen to his crotch, and from there to the ground, forming a small puddle that grew together with a few drops falling from his brother's penis.

"Gross!" groaned the boy, searching with his eyes for something around him to wipe himself with.

"Don't be picky, that's called semen, that's how I mark my wives. So cheer up, because you're now officially one of them," Christian said, proudly.

" Brother... What do your other wives do?" asked Lucas, averting his gaze somewhat embarrassed.

"Well... Kevin loves my cum, he swallows it all. And I hope you'll be a good wife like him and do the same," the teen replied, with a leering look.

The boy nodded and scooped up some of the sticky liquid in the fur of his genitals with the palm of his hand, took it into his mouth and licked it off, holding it inside his muzzle for a moment before grimacing in disgust.

"It's so bitter!" complained Lucas, sticking out his tongue and spitting on the ground.

"Hey, don't waste it! You'll get used to the taste, but don't spit it out!" reprimanded the teenager to the boy.

"Yes, sir..." stammered the little rabbit, and continued to grab his brother's seed with his fingers and swallow it until he was completely clean.

Christian stroked his little brother's head, congratulating him. "Good job, now suck the tip of my cock, that's another thing good wives should do too."

Little Lucas leaned forward so he could bring his lips close to his brother's wet glans which was slowly contracting, returning to its flaccid state. With one of his hands, the boy had to pull back the teenager's foreskin to fully uncover the area he was to take care of. Luke swallowed saliva at the sight of his brother's dripping manhood, this was his prize, this was what he wanted, he had to become a good wife to Christian if he wanted to be penetrated with the same force and passion as Kevin, he needed to feel that unique brotherly love.

When the boy finished cleaning the teen's cock, Christian complimented him and kissed him on the lips, sticking his tongue a little deeper than he should have into his little brother's mouth, even going so far as to taste a little of his own cum.

"That's all for now," said the teen, releasing his little brother.

"That's it?" asked Lucas, regretting that it was all over.

"Well... Whenever we can, when we finish playing with Kevin we take a shower together," Christian admitted.

"Can we do that too?" asked the younger brother.

"Sure, plus it would be a good chance for you to get used to it. Next week you'll need to shower several times, I'll tell you that much," the rabbit teased.

"Several times? Why?"

"You'll see."