Mika, his mother's best friend, comes over for a visit. Adult Kota assumes she will be some dull older woman, but the person who appears before him is a gorgeous beauty with huge tits. Stunned by Mika's looks, he chats with her about romance while they wait for dinner. Then she suddenly asks, “Want to practice kissing with me?” Kota is bewildered, but Mika keeps pushing until he agrees to practice with her...