It was the 5th spring in a time of beautiful harmony, a time when kimonos and sandals were still widely worn. In Fukamachi, a red-light district located in Kosaka, 2 certain incidents are threatening people's lives. One was an extremely vicious assault, the other is persistent acts of stalking targeted at prostitutes, their owners and whoever went into the red-light district. These insidious crimes have become an object of fear and has gradually driven people away from the red-light district. Through his best friend "Kuroji", the protagonist is offered a job as a bodyguard for a Tayu ranked courtesan named "Yozuru". Although he has never worked as a bodyguard before, he immediately agrees, thinking that he can repay his debt to the temple for its hospitality. However, when night comes along, the courtesan approaches the protagonist who is standing guard. What was supposed to be a simple distraction from her anxiety turns into something more! Just how far will it go...? Investigating cases during the day, and having a titty-fucking session with a busty courtesan at night before going to bed, this is a slightly raunchy fantasy! A Japanese-style otherworldly fantasy!