Kioku Sousitsu!? Watashi no Kareshi ha Docchi? Karada de Tameshite・・・ | 失忆!?我的男朋友到底是谁?用身体来确认…Ch. 1-2
[Takatsu] Hitozuma A-san to Musuko no Yuujin N-kun - Married wife A and son's friend N-kun [English]
YUUKA'S VERSION of Because my childhood friend is not interested in sex, I fucked his friend instead