Hito no Ki mo Shiranai de (Harumare)

A sidelong glance, a gentle brush of the hand, a coy comment, an afternoon reading hentai doujin on his bed - no guy will ever understand such subtle hints. You have to grab their cock and tell them you want it. At least that's what Saki has to do with her childhood friend Shuichi to let her feelings be known. Source: