Kimi made mousugu by Akira Kanbe

Jilted by their girlfriends, Maniwa and Kosuki get drunk together. After Maniwa passes out, Kosuki kisses him and realizes he's in love with the other man. When Kosuki tries to avoid future encounters, the pair quarrel until an old friend helps Maniwa discover he's in love, too.

BL manga for sale at Mangaroo.