Takuma was in agony over a problem... That is, he couldn't reach orgasm inside a girl. Yukari was the prettiest girl at school, and he'd somehow managed to succeed in confession his love to her... but now what? His body was his own enemy. He couldn't go further.

At that time Yukari's little sister Kana discovered Takuma's secret fetish. He loves girls in tight, dynamic racing swimsuits. "Hey, if she wears that you can cum inside her, right?"

What a solution! If Yukari slips into a sexy one-piece, all his ejaculation woes are gone... ... but as he thinks it, Kanade declares her own desires!

"Cum in me, Takuma-san! Make a baby in my love hole!"

A wild love triangle battle between buxom sisters explodes just as Takuma is finally able to explode his hot sperm up their tight slits!