Free-spirited omega Shishikura and straight-laced alpha Kotani have disliked each other since middle school, so neither are pleased to learn they will both be working at the same company. Shishikura is even less thrilled when he discovers that he and Kotani are a fated pair! The two men take verbal swipes at each other every chance they get, yet still wind up in bed together again and again. Both chalk it up to biology and refuse to admit that deeper feelings might be involved, and Shishikura begins looking into other potential marriage partners. Will this tsundere couple ever get their act together, or will destiny be derailed by their own stubbornness?