Mr. and Mrs. Morishita run an inn in a certain hot spring area. In response to this recession, the inn was singing a quiet bird. Her husband Yuya's father cherished the inn, and Mirei was also indebted to her when she was a lover. Not wanting to close the inn, Yuya borrowed money from a financier to cover the repairs and living expenses of the inn. He told Mirei that he was fine, but... One day, a yakuza visits him who has been asked to collect the debt.
