This is a story that revolves around Makoto, who finds himself entangled in a love triangle with two heroines - Kotonoha and Sekai. Though they both have feelings for him, Makoto develops a strong attraction towards Kotonoha, a girl from a different class in the same grade, whom he often sees on the train to school. Despite his earnest efforts, Kotonoha remains oblivious to Makoto's feelings for her. Meanwhile, Sekai, who is deeply in love with Makoto, takes it upon herself to play cupid and bring them together.