OBA-123 Father's business trip spending one night and two days with stepmother Kafuku Kaoru

Kaoruko is married to Takashi, a man she met at a restaurant where she works. Takashi is divorced and has an only son, Kenta, and Kaoruko is the mother of a child in her first marriage. However, Kaoruko was at a loss as to how to deal with Kenta, who was already quite old. One day…. Takashi will leave her house for an overnight business trip. Kaoruko wants to become friends with Kenta because of this, and Kaoruko confronts Kenta with a question she had...