THE SMART TRICK OF OSHI NO KO MANGA THAT NO ONE IS DISCUSSING

Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, could be the reincarnation of Sarina Are inclinedōji, considered one of Gorou's clients who was a supporter of Ai. Four a long time later, Ai is murdered in front of the twins by a similar lover who killed Gorou. The lover later on commits suicide, but Aqua deduces the murderer might