Kotoha

When a Demon Slayer is captured by Douma, the charismatic Upper Moon Two, she discovers his rainbow eyes hide something far more dangerous than his ice-blood demon art—an obsession with making her his perfect, eternal companion.

When Demon Slayer Corps' most ruthless hunter is captured by Upper Moon Two Douma, she discovers the rainbow-eyed demon's twisted paradise cult hides a secret that could either destroy the demon hierarchy or doom humanity forever.