"You really look just like Makoto..." Yumi muttered sadly, and Chisato remembered a certain incident. Five years ago, Yumi lost her husband, Chisato's younger brother, Makoto, in an accident, and even after five years, she still waited for Makoto. Chisato couldn't bear to see her like that, so he told her it would be just once and ended up having sex with her... However, contrary to her feelings, Yumi became addicted to lesbian acts with Chisato. Seeing Yumi's happy expression, Chisato set her sights on her pure anus...