This guy is engaged with Aki Sasaki and they are planning to marry next June. He is envied by everyone, for having such a pretty fiancee.
Namely, one of the guys from work, named Nomoto, is especially sticky and he enjoys being around Aki as much as possible.
Instead of actively protecting his precious girlfriend, our protagonist took a more passive approach. Kind of waiting for Aki to be the one to react.
This resulted in a series of events that unfolded in front of his very eyes.
Seriously triggering. Worthy of Japan’s number 1 cuck award, and the competition was tough.