The owner of an inn in a certain hot spring town, Hirai, along with the maid Kai, is not putting much effort into managing the place and is living lazy days. They have been eating away at the inheritance left by the previous owner, but that too has reached its limit, and recently they are constantly being threatened by debt collectors. One day, two female students, Rei and Nana, come for a part-time job as part of their internship. Knowing the situation, the debt collector Kudo makes an extremely evil proposal: to turn them into companions who provide sexual services.
