Kentarou loses his sanity and attacks Yuna, the married woman next door, unable to bear the moans of pleasure he hears every day. Though initially resisting his sudden assault, Yuna can't help but suck on his hard, erect cock when she sees it. The man and woman, transformed into beasts, repeatedly climax and ejaculate, seeking only pleasure. Their intense, ecstatic sex explodes with a mix of vaginal fluids and precum.