Rin has returned home to take part in a local festival. She stays at her friend Yumi's house, but Yumi's son Yuya can't hide his joy at being reunited with the woman he admires. That night, a tipsy Rin comes to her room... With the help of alcohol, he is sexually awakened for the first time by her, and tells her all the feelings he has had up until now. Happy to be desired by a young man, Rin can't help but make love to her. Since then, the two have been secretly seeking pleasure from each other, and the day of Rin's return draws near...