Detective Conan: Cat Boy

Mao Lihan, as Xiaolan's biological brother, risked his own life when Xiaolan was in danger, sacrificed himself and jumped off the cliff. As a result, when he was about to die, he was picked up and taken away by Bellmore in the organization, and was trained to be a first-class killer. Destiny made them meet again, but unexpectedly turned into cats due to the system. And because of chance, he met the person he loved most at the time (the male protagonist turned into a cat because of the system)