Joushi to Ore no Himitsu

The love full of mistakes between my boss and I is about to begin?! Just because of a single mistake, my life is about to go through an unbelievable change.

Drunken, Nagato Hiroki committed a mistake of one-night stand with a man who he barely knows! But, it was found out that his newly assigned boss, Kurosawa, is that man from the past he had one-night stand with!

(Source: Crownprince Translations)