A senior-junior couple from a university karate club. The boyfriend visits his girlfriend's room for the first time since they started dating. Her scent fills the space, and his heart races at her words: "It's an honor to have you here, senpai." Drawn in by her eyes, brimming with tension and excitement, they progress naturally from a kiss to sex. She takes a strict, obedient attitude, following his every command—allowing him to observe her body and guiding her through masturbation. After changing into her karate uniform and receiving training, they move straight into intimate practice, still dressed in their keikogi. As her tension fades, she becomes increasingly eager in pursuing pleasure. This is an erotic portrayal of pure love, capturing the couple's first deeply intimate encounter.