In this 4-episode hentai OVA series from studio Suzuki Mirano petit (based on the popular Beelzebub adult game), the antisocial protagonist Tsunetaka uses his surveillance skills to spy on his new stepfamily. Resenting the changes to his home, he focuses his twisted attention on the two gorgeous step-sisters.

Episode 1 & 2 center on Yuki — the tsundere, complex-conscious younger sister. Through hidden camera footage and clever misinformation, Tsunetaka blackmails her into sexual acts, turning her from a cheeky girl into his obedient pet through intense “bitch training” and breast-focused milking sessions.

Episodes 3 & 4 shift to Sayaka — the responsible, big-breasted elder sister who appears as the perfect honor student. Tsunetaka strips away her composed facade, exposing her hidden lewd side. What begins as revelation quickly turns into full-on淫乱洗脳 (lewd brainwashing), molding the once-proud girl into a submissive, clingy meat toilet who craves her new “master.”

Narrated from stepmother Shoko’s worried perspective, the series delivers classic home-invasion blackmail, voyeurism, coercion, and heavy corruption themes with high-quality animation focused on voluptuous bodies, detailed expressions, and escalating domination. Perfect for fans of NTR-adjacent step-family corruption and mind-break hentai.

Based on the erotic game by Beelzebub.