Megumi, his mother's friend, comes to see the public display of his favorite pandas. Even though it's been a while since they last met, her beauty is still the same, and Masato, his son, is reminded of the excitement of his first love. That night, while drunk and in a good mood, he accidentally kisses her... Unable to forget the sensation, the two of them end up sharing a secret night together. The next day, Masato is excited because he can't forget about last night, Megumi refuses, telling him to "forget about last night," but...