"Shinji" has been harshly dumped by all the women he's ever dated.

He's taken to drowning his sorrows in alcohol, and one day, he drank until he fell asleep with a porn manga in his hand. When he woke up the next day, his phone was flooded with messages inviting him to compensated dating.

He agrees to meet up with "Mari," a woman who offered the lowest price among them, and only after doing the deed with her, did he realize that he's been transported into "a world of reversed morals"…

(Source: Melonbooks)