Tameiki Sex Lemonade

Takeru, an ordinary college student, is in love with his childhood friend and handsome classmate, Yusei. Takeru was initially satisfied with simply fantasizing about their friendship, but things take a sudden turn when Yusei suggests the two of them have sex. After the Yusei and Takeru's passionate tryst, they end up as sex friends, leading Takeru to dread the day things come to an end. Nonetheless, Takeru's mind and body still yearn for Yusei... The two are in love with each other, but can't seem to say it to one another.

(Source: Frontier Works)