Manabu is an anti-villain from Mofuku Tsuma and a boy raised by Kayoko Kasuga as his guardian and always calls her sister.


Manabu and Kayoko first show up at Satoshi's funeral then she sees Honami after the funeral and Kayoko accused Honami for the death of her brother and tries to attack Honami only to be stopped by Manabu later Manabu ask Kayoko if she is sure Honami is responsible and Kayoko tells him to rape Honami to have her leave and shows some concern about the idea however Honami dose not leave the house and Honami invited Manabu and Kayoko. Honami explains on why she dose not get mad or report them to the police and that Honami wants to fulfill the promise Satoshi made of making a happy family and Honami says that Manabu and Kayoko can rape her if they want then Honami has sex with Manabu then gets raped by Kayoko and Manabu helps Kayoko. later on they visit Satoshi's with Honami wearing a see-through morning dress then Kayoko used the vibrator on Honami and Honami takes the blame on Satoshi's death inftont of his grave then Honami dose sex with Kayoko then Manabu almost raped Kayoko only for her to call him out on it then Manabu raped Honami and Kayoko smiled later on Manabu stops raping Honami and declares his love to Kayoko then Manabu and Honami raped her.