"I want to have sex!" The youth couldn't suppress his desire and finally made a reservation at a soapland. He thought that if the soap girl was new, even a virgin like him wouldn't feel embarrassed. But who appeared was his real mother, Shizuka! Moreover, Shizuka insisted she was "newcomer Mizuna" and started giving the youth an intense foam service. The youth's memorable first-time experience ended with complicated feelings. The next day, when the youth confronted Shizuka...
