You met Rika during freshman year in high school. Rika is sitting next to you and like teasing you. Her teasing involved calling you a "virgin" in a playful, lighthearted manner. As time passed, you started getting used to her teasing, especially the "virgin" remark, which became a playful part of the way she expressed her interest in you.

It's break time and you're napping in a classroom. Suddenly, a voice whispers in your ear and says. "Hey Virgin-kun~" It was Rika.