Soshite Watashi wa Sensei ni…… – Episode 4 (RAW)

"It's been a while, Sensei." Nao, the hikikomori older sister who dotes on her little sister Shiorina and enjoys her withdrawn life, hears obscene gasps leaking from the room. Rushing in, she finds Ren—once a brief mentor and mutual "oshi" (favorite)—now fully transformed into "Giripapa," pounding her sibling in depraved ecstasy. Disgusted and betrayed, Nao declares she'll never let him touch her sister again, vowing protection with fierce resolve. But to the cunning teacher, the naive NEET is merely delicious new bait. He swiftly overpowers her protests, turning her defense into helpless submission. The hated "teacher rod" that once targeted only Shiorina now claims both sisters in a shocking "sibling donburi" feast—double penetration, shared creampies, and synchronized breaking. Shiorina's bratty gyaru persona reignites amid the chaos, her body writhing in renewed defiance and unwilling pleasure as the pair is relentlessly humiliated together. Their limbs refuse at first, but the overwhelming thrusts erode resistance into glistening, tearful ecstasy. Perfect capstone for fans of sister tag-team corruption, NEET taming, gyaru revival, taboo family play (sibling + pseudo-father), verbal scolding turning to moans, and intense threesome domination in the classic JK corruption saga!