Aqua's revenge stops being about justice somewhere between episode three and episode four, it becomes about whether he can stay human while hunting the person who took everything from him. The show knows this shift happens before he does. Season 2 trades the supernatural shock of season one for something colder: watching a teenager weaponize his talent and charm the same way his father did, realizing too late that revenge isn't a plan, it's a mirror. The animation frames every moment of his performance like a confession, every scene in that theater troupe another layer of who he's becoming instead of who he was. By the finale, you're not rooting for him to win, you're terrified of what winning looks like.

Aqua's vendetta consumes him. He believes the man who arranged his mother Ai's death is his own father, who once acted with the famous theater troupe Aqua now joins. With producer Masaya Kaburagi's help, Aqua and Kana Arima win the roles of Touki and Tsurugi in Lala Lai Theatrical Company's stage version of the hit manga Tokyo Blade. Aqua's girlfriend Akane Kurokawa co-stars as Princess Saya, a part that has shrunk in the manga because fans favor Tsurugi as Touki's partner, and she struggles to settle into it. Changes to the script also upset the manga's author, Abiko Samejima. Aqua cares little about the play: his real aim is to get close to director Toshirou Kindaichi and learn what he knows about Ai. Meanwhile, his twin sister Ruby follows their mother's path toward becoming an idol. The season is a psychological mystery drama with supernatural elements.