Kono Naka ni Hitori, Imouto ga Iru!: Ani, Imouto, Koibito

Shougo Mikadono thought his life couldn't get more complicated after inheriting his father's company, a succession contingent on him finding a wife from his new school. But the biggest hurdle isn't the competition; it's the unsettling revelation that one of the potential brides might actually be his long-lost sister, a fact he'd completely forgotten due to amnesia. Now, Shougo must navigate a perplexing gauntlet of charming, eager young women, all while trying to uncover the truth of his past and avoid an unthinkable romantic entanglement. This uproarious comedy of errors promises plenty of blushes and absurd situations as Shougo attempts to solve the ultimate family mystery.

✦ AI-drafted summary