Usaotome

"If you let us stay... you can do naughty things with us." Mitsuhiko Okaya, an unremarkable man, was betrayed by his wife and a junior colleague. At work, he was mocked as a useless editor and spiraled into despair, until one day before him appeared a pair of twin high school girls he shouldn't know, yet somehow seemed familiar. The younger twin, Akari, was lively, cheerful, and always teasing him, while the elder twin, Nanako, was shy and clumsy, yet secretly a closet pervert. They were once his students from the cram school where he worked during his student days.

A weary office worker, drained by the demands of a black company, finds his monotonous life taking an unexpected turn. One day, mistaking a plastic bag caught on a utility pole for a cat, he leans over his balcony to investigate. His concerned neighbor, misinterpreting his actions as a suicide attempt, intervenes dramatically. Upon regaining consciousness, he discovers he's been bound and confined in her apartment. The neighbor, exhibiting obsessive affection, declares, "You're safe now... I'll take care of you forever."