As usual Serena is late to school. While she attempts to climb the schools back wall, she meets the mysterious transfer student, Yukinosuke Yukimura.

Yukinosuke's good looks, but unfriendly and cold attitude gives her mixed feelings, wondering if anything is wrong with her.

At the arcade trying to relieve her stress, she gets in trouble with a gang of teenage boys.

Serena worries about her previous night spent with Yukinojo, and decides to forget about it. However, Yukinojo shows up in the class as a transfer student. Serina is surprised and puzzled by the unexpected reunion.

Class president Reona, is also worried about Yukinosuke, who gives off the same atmosphere as herself. Sanae, Reonas best friend notices her feelings for Yukinojo, and encorages Reona to make Yukinosuke her boyfriend.

One winter day, Yukinojo's former lover Akiko transferers to the school.

As Serina and Akiko's feelings for Yukinosuke intersect, the reason for Yukinosuke's transfer and the deep sorrow that rests on his heart becomes clear.