Tatsuya separated from his mother when he was young and lived with his father all his life. Tatsuya grew up without knowing his mother's love, but the memory of her kind and beautiful mother lives on, and that is the only thing that supports him every day. Time passed and a letter arrived. He was told by his mother that he wanted to see him for the first time in 12 years. Tatsuya, who happily heads to the designated hot spring inn, didn't realize that his admiration for his mother had turned into romantic feelings.
