Crazy Love: My Twisted Relationship with My Sister (Live-Action Version) MIMK-184

The older sister, Takasaki Mia, is beautiful, intelligent, and skilled in both martial arts and academics; she's universally loved. On the other hand, her younger brother, Yuuto, is ordinary and unremarkable. However, he has an ordinary romance, almost becoming lovers with his childhood friend, Rin. Suddenly, the younger brother descends into madness. While their parents are away on a trip, he and his sister are alone, and it seems something has been put on them... When he wakes up, he finds himself naked and tied to the bed. His sister is licking his body, putting her tongue in his mouth, and grabbing his erect penis. He knows he shouldn't, but his body involuntarily feels pleasure...