My Other Half (2024)

Kind-hearted but clumsy Umi Mizumura agrees to help his twin brother Riku by pretending to be him and breaking up with Riku's boyfriend, Chiaki. But nothing goes according to plan. Through a series of misunderstandings, Umi and Chiaki end up living together, beginning a chaotic life under the same roof. As time passes, Chiaki slowly realizes that the person before him is completely different from the Riku he remembers. What begins as a mistaken-identity romantic scam gradually turns into an uncontrollable crisis of the heart.