[Hi-per Pinch (clover)] My Best Friend's Girlfriend 4 Dignity Violated by Swinging [JusenkyoTL]

An ambitious couple invites their best friend and his girlfriend into a swinging arrangement that shatters the protagonist’s sense of fidelity. As the night unfolds, the shy, voluptuous heroine is taken by the friend while her own lover watches, his desire mounting with each intimate touch. The tension escalates when the friend’s aggressive advances force the heroine into an overwhelming climax, exposing hidden cravings and testing the limits of trust.