Kimi wa Koi wo Shiranai You don't know what love is.

Synopsis

No matter how difficult the matter, Oohashi Kazuya wins out with a composed expression. He’s the absolute ace of the sales department. But his true face is that of a worldly-wise man who’s a crybaby. One day, when a younger accountant Iwashimizu discovers his true nature, for some reason he asks him out?! For Oohashi, everything is going swimmingly with work and with a perfectly attentive lover, but there’s a dark side to Iwashizumi’s niceness… (Source: MU)