Kazuya and Misao, coworkers who initially disliked each other, grow closer after an incident, falling in love. But Misao learns Kazuya is already in a committed relationship, making her the third party.

Kazuya Ichikawa and Misao Narita are employees of a trading company who did not like each other at the beginning. However, an incident caused them to slowly got attracted to each other and they fell in love. However, Misao later found out that she is a third party as Kazuya has a woman whom he is dating with marriage in mind.