Bishimai rezu: Kichû no hi ni...

Original title: 美姉妹レズ 忌中の日に...

Aiko, a high school student, was forcibly defiled by her mother's new partner. While brooding by the riverbank, she is approached by Momoko, an art college student; despite being strangers, Aiko finds a sense of comfort in Momoko's presence. Later, Momoko asks Aiko to be a nude model...