Unpopular theory...
When Hirose was talking to Nakamura afterschool during Valentines. I dont think it was Hirose's true question to ask him about him getting chocolates... (more in comments again)
#ガンバレ中村くん#goforitnakamura
Those are the same sad eyes as when he was going to leave Nakamura and force himself to conform and go with his friends instead of staying with Nakamura like he wanted to...