Hoshi no Suna Monogatari

Gengorou Imai is a 19-year old lad who wants to have a simple life, his only passion being young pretty women. He stays in a boarding house in the country, enjoying the quiet life, the sea, the beach, and the abundance of those he likes most... So all goes well, until one of the guests who was staying at the boarding house is killed. Not entirely trusting the police, the owner of the boarding house asks Gen to look into this. Gen knows that the deceased was having a relationship with the owner's daughter. The young man begins his investigation, saying good-bye to quiet life - but not to the seductive young female tenants of the boarding house...

[From Moby Games]