Koi nanka Suru Hazu mo Nai

Taniya, a member of the accounting department, does not like irregularities and prefers to live a quiet, unassuming life. One day, he is coaxed to attend a drinking party by a colleague where he runs into paperwork resubmission man?! His name, Irobe, and he was someone Taniya would seemingly never be able to get along with, until a conversation between them proved to be unexpectedly, pleasant. On their way home, while Taniya was basking in the ambiance of good vibes, he's suddenly kissed by Irobe. Though Irobe confesses his attraction to Taniya, bitter memories of a same-sex partner in Taniya's past resurface...?

(Source: Kaiohsha)