Summary
His little sister is so pure, she's just like an angel. And she's gotten herself a boyfriend... who happens to be a rather infamous playboy around school. Kai will do anything to keep his sister safe, even if it means ruining her relationship. But how exactly can he make the couple break up...?
Characters
![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](//img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/de5aefe4d89e0373a40c99f57c8b7c40.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")
Kai
Two years older than Yui. A secret masochist who loves his sister. Also a virgin.
173 cm
71 kg
Blood type A
Karate club member
A normal guy.![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](//img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/8654909c417c1c21909f3163e045f049.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")
Takaya
One year younger than Kai. Has dyed green hair.
186 cm
87 kg
Blood type B
Not, a normal guy.![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](//img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/14793208a36df79d3dcfdaea087a7409.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")
Yui
Kai's beloved little sister.
She loves him a lot, too.
Takaya is her first boyfriend, and she always does her best when she's studying.
A normal girl.
![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](http://img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/de5aefe4d89e0373a40c99f57c8b7c40.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")
![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](http://img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/8654909c417c1c21909f3163e045f049.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")
![I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]](http://img.dlsite.jp/modpub/images2/parts/RJ371000/RJ370281/14793208a36df79d3dcfdaea087a7409.jpg "I'll Take You Instead of Your Little Sister [Tanuki's Ballsack]")