The early screening for the second installment of the Sakamoto Days anime series disclosed new supporting characters, the theme song, and an additional promotional video on Sunday. The series is set to debut on July 15 at 12:00 a.m. on TV Tokyo and various other networks. The cast includes Mafuyu Seba: Daiki Yamashita (Boku no Hero Academia), Akira Akao: Mao Ichimachi (M.A.O.) (Tensei shitara Slime Datta Ken), Kanaguri: Satoshi Hino (Overlord), Rion Akao: Mamiko Noto (Re:Zero kara Hajimeru Isekai Seikatsu), and a pop-rock band…