Megunda Koi ni Koiwazurai

Ever since he was kid, Daichi has loved Haru, the part-time worker at his parents restaurant. Haru sees him as a little brother, but when Daichi, now in junior high school, kisses him like he used to, he realizes that he can no longer accept his affection as he used to. Eventually, Daichi becomes a high school student, and Haru can't even look directly at his naked body since is like an adult man now...?

(Source: Julian Publishing, translated)