Kuroko no Basuke dj - Kimi Kara Hanarerarenai Riyuu

Pairing: Kise x Kasamatsu

From Fujoshi Bitches:

Something is distracting Kasamatsu and when Kise doesn?t get an answer about what that something is, all he can do is guess. But when Kise finally learns the reason for his senpai?s wandering mind, it isn?t one that he can accept.