The age-old dilemma of choosing between your friend and the one you love is the lesson for the day for these bubbly high-schoolers. Insecure and bespectacled student Karin Karino experiences the bumpy ride of first love in this touching drama set against a backdrop of high school life. And living happily ever after isn't on the curriculum, as Karin finds herself the center of popular boy Kiriya's attention, as well as the bull's-eye in embittered classmate Yuka's dartboard of hate. When Karin becomes handsome Kiriya's object of affection, she wonders if she can truly deal with the consequences. Upon learning that Kiriya asked Karin to be his girlfriend, Karin's schoolmate Yuka bullies her and pushes her down a stairway to depression. Later, Kiriya asks Karin to go on a trip over their summer vacation, but their plans take one wrong turn after another. Can Kiriya bring Karin happiness? Or does his love just spell trouble?
