Yuji can't hide his joy when he learns that his mother's friend Rinko, who he has admired since childhood, will be staying at his house due to work. - He is excited and entertains her, but Rinko's work is not going well and she seems depressed... - That night, while the two of them are drinking alone, Ririko, who is in a state of agony, approaches Yuji in a drunken manner. - Yuji is swayed by an invitation from his lover... - The two secretly continue to experience pleasure. - However, such a sweet time will soon come to an end...