窓際編集とバカにされた俺が、双子JKと同居することになった, After Being Mocked for Being a Sideline Editor, I Ended up Living With Twin High School Girls, Madogiwa Henshu to Baka Ni Sareta Ore Ga, Futago JK to Dokyo Suru Koto Ni Natta

"If you let us stay over... we'll do something naughty with you." Mitsuhiko Okaya, an unremarkable man, was betrayed by both his wife and a junior colleague. Mocked at work as a useless, sidelined editor, Mitsuhiko falls into despair — until two twin high school girls appear before him. Strangely, although they seem unfamiliar, he feels a sense of déjà vu. One is Akari, the lively, cheerful younger sister who loves teasing him; The other is Nanako, the shy, clumsy, yet secretly lewd older sister. It turns out they were once his students back when he worked part-time at a cram school during his own school days...