The "Brothel of No Return" is said to be a house of monsters disguised as prostitutes who eat their clients. A human and a monster met there once and fell in love. What became of them...? Official Translations...

In the world ruled by the clan of the family, “Yamauchi”, the selection was started after the successor Wakamiya. The four princesses who were sent to there to compete against each other had their own thoughts...