When Alice develops a crush on a stranger at the train station, she offers her best friend, Hana, the stranger's "half brother," Masashi. Hana declines, but after watching Masashi from a distance, she develops feelings for him. She stalks him by travelling on his regular train throughout the winter.
During the spring, Hana and Alice enroll at Masashi's high school. Hana learns that Masashi is a member of the story-telling club, which prompts her to join. As she continues to track him secretly, she witnesses him crash into a garage door, which leaves him unconscious. As he awakes, he finds Hana leaning over him. She reveals that a blow to Masashi's head has given him a case of amnesia and that she is his girlfriend. Hana and Masashi soon hang out as a couple while she continues deceiving him about their relationship. Alice becomes involved with Hana's lies by pretending she is Masashi's ex-girlfriend. Alice, in the meanwhile, gets scouted for a modelling job and succeeds in getting in. She also tries to reconnect with her father.
Through a series of events, a love triangle unexpectedly develops between Hana, Alice and Masashi, when Masashi falls in love with Alice, who he still believes is his ex. Masashi eventually learns of Hana's lie about his amnesia and reacts accordingly, which tests Hana and Alice's friendship. Alice proceeds to audition for a modelling job for the front page of a magazine cover. To prove her worth, she performs a ballet routine that impresses the casting director. The final shot finds Hana and Alice giggling at Alice's front cover photo.
