Sakuma is introduced to Koutarou Douchin, a young boy contracted with Gusion, a monkey-like demon who eats the memories of others. Akutabe asks her to take him to school, but she is disgusted by Douchin's bad attitude and sexual harassment. Akutabe is forced to call upon the increasingly unstable Undine, who is revealed to be desperate for a husband. Undine takes Douchin to his school, Golgotha High, where she meets and falls for Himoi, Douchin's new homeroom teacher. She then tricks the handsome but stupid teacher into signing a contract and to say that he loves her. When Douchin accidentally breaks a vase in the principal's room, he calls upon Gusion to eat the memories of Himoi and the principal to cover his actions.
“忘却”を司るグシオンという悪魔に記憶を食われたという少年・光太郎に引き合わされた佐隈。彼女は芥辺から、保護者として光太郎と一緒に中学校に行き、転校の手続きをしてくるように命令される。生意気極まりない光太郎の言動にアザゼルと同じ臭いを感じ取った佐隈は、拒否の姿勢を取るのだが……！
