Reika, a college student, was practicing dance on the floor above. The noise disturbed the man living below, who could no longer endure it and went up to her room to talk. Surprised, Reika apologized. But then, strangely, he decided to show her his own dance moves. He pointed out that although she had a pretty face, great figure, and solid technique, she lacked sexiness. To help her become more alluring, the neighbor made her strike sexy poses. Pretending to give advice, he began touching her body. Soon, their mutual desire intensified, and they suddenly gave in to passion. Overcome by lust, the neighbor penetrated Reika's body.