Other name: 上司と俺のヒミツ, 我和上司的秘密
Summary: 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!