You don't know what love is.

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 wordly-wise man who’s a crybaby. One day, when a younger accountant who’s made a bad impression, 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… I’m happy with only my work, but I won’t run away from this love.

(Source: Japanese publisher, translated)