Chitose, a friend of his mother, comes to stay at the house for several days to help out at the family shop. Her presence fills her son Hiroyasu with uncontrollable excitement. Knowing his mother will be out drinking with regular customers after closing, Hiroyasu finds himself alone with Chitose and increasingly drawn to her demeanor. When she innocently speaks to him, his heartbeat quickens. Unable to resist her allure, he finally presses his lips against hers. Overcome by the sensation of kissing after so long, they passionately devour each other's mouths. That night, unable to sleep, Hiroyasu appears in her room late at night, leading to an intense new development.