Masataka and Yukie are a married couple who have been married for 7 years, but relations have cooled. Masataka was having an affair. Then, he impregnated his affair partner (a 17 year old), who ended up having an abortion.

What is the end result of adultery, pregnancy, and abortion? A suspense story about ordinary people that will make you wonder why they got married!

NOTE: This is a description of volume 1. Volumes 2-5 contain additional stories about the main couple and their exploits set in the same universe and after the event of volume 1. These stories can be read as a whole, however individual volume descriptions for Volumes 2-5 describe themselves as alternate universes and "what-ifs?"