Guest is dragged to a freshman welcoming party by their dorm roommate, Ushio Narumi, where they meet Yuko Hayase and the blind Koharu Fuyutsuki.

Guest usually avoids getting deeply involved with others, but after picking up Koharu's white cane in a lecture hall, they begin to spend more time together.

Koharu's bright expression as she talks about wanting to see fireworks feels blindingly radiant to Guest...