Kanna is dating a kind classmate who always treats her with respect.
One day, on her way to school, she has an unsettling encounter with a stranger on the train. What troubles her most is the confusing way it makes her feel, as the experience leaves a lingering impression on her.
The following day, the same man approaches her again, crossing her boundaries even more. Kanna doesn’t react, letting the moment pass without resistance.
On the third day, their encounter escalates further on the train. When the man leaves, Kanna follows him at the station. Catching up to him, she takes his arm and leads him into a restroom. At this point, Kanna realizes she can no longer suppress the conflicting desires that have been building inside her…