FSTB-011 Project SEX: A hot spring inn with 4 big-breasted sisters located deep in the countryside - A dramatic reversal from a situation on the verge of going out of business.

A family-run hot spring inn deep in the mountains that is famous for its secret hot springs. - However, his parents died in an unexpected accident. - The four sisters decide to inherit the inn, which is also a memento of their parents. - However, there was no way they had the ability to run an inn, and the inn was driven to the brink of collapse. - However, this is a sex story in which the girls use their big breasts to successfully rebuild an inn. - *There are no performers under the age of 18 in this work.