Yoshikichi Hiyoshi leads a miserable life—constantly harassed by his boss and always taking the last train home. But when he's suddenly forced to move out of his apartment, he ends up relocating to a suspicious new property… only to find that it's a private harem, just for him. Have I… inherited someone else's harem? If so, for what purpose? Thus begins a mysterious, alluring harem life, shrouded in secrets and temptation.