Is it possible to make friends across generations through mixed bathing? - A group of close female college students and a lone old man who spoke to each other separately at a hot spring inn suddenly find themselves in a harem mixed bath! - In addition, try naughty games with prizes such as ``Wash your breasts'' and ``Wash your dick''! - Will they be able to become friends enough to do the last mission, “Have sex with everyone◆”? - ?