Yuki is a serious senpai at the tenis club at highschool and he has a crush on Tsukasa, his kouhai but his nervousness makes it look like he hates Tsukasa. When Tsukasa finds senpai jerking off to him while wearing his jersey, he decides to help him relive himself by touching Yuki. Their relationship soon change, due to Tsukasa finding Yuki erotic.
Boku wa Kimi no Iinari