犠母姉妹

The owner of the ryoukan inn at a hot spring resort dies and his widow inherits the establishment. Five years later protagonist Keichi shows up at the ryoukan with the will of old master saying about transferring all the property to Keichi. The the different motives in mind they come to a deal to leave things as they are for now in exchange for widow body. Daughters of the widow start to have doubts about this relationship...

[From vndbreview]