Bishimai rezu: Kichû no hi ni...

美姉妹レズ 忌中の日に...

Also known as Bishimai les: Kichû no hi ni..., Beautiful Lesbian Sisters: On the Day of Mourning..., Mofuku les shimai: Futari dake no seiiki, 喪服レズ姉妹 ふたりだけの聖域

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...