Akane was having trouble getting along with her stepson, Kazuya. Even though they are not related by blood, she wants to deepen the bond between them, but it is not going well. At that time, her husband goes on a company trip. Akane is left alone with Kazuya without any preparation. She tries to gradually deepen her communication with Kazuya, but... Akane's aggressiveness stimulates the lust of adolescence...