Tomodachi no nayami ochi〇po dekaiketsu suru hanashi

After discovering his friend Rin's secret stress-relief method, Takashi decides to intervene in an unconventional way. He blackmails Rin's mother, Emi, forcing her into a sexual relationship with him. However, the situation escalates when Rin unexpectedly returns home and catches them in the act. Rather than being upset, Rin surprisingly decides to join them. The encounter ultimately culminates in a threesome between Takashi, Rin, and Emi.