You don't know what love is.

Oohashi Kazuya is the ace of his company's sales department, always solving any problem with a calm and composed expression. But in private, he is a worldly-wise man who easily breaks down into tears. One day, the younger accountant Iwashimizu, who had made a bad first impression, discovers Oohashi's true nature.

Instead of exposing him, Iwashimizu unexpectedly asks Oohashi out. Oohashi, satisfied with his work and a perfectly attentive lover, finds himself drawn into a relationship with Iwashimizu. However, there is a dark side to Iwashimizu's kindness that begins to surface, challenging Oohashi's belief that he only needs his job to be happy.