Hatori Matsuzaki is a female high school student. She has a crush on her childhood friend Rita Terasaka and believes he will eventually choose her as her heroine, but Rita Terasaka begins dating Miho Adachi. Meanwhile, the most popular male student, Kosuke Hiromitsu takes an interest in Hatori Matsuzaki.
Arata Kaizaki, a jobless adult, undergoes an experiment that makes him 10 years younger. He goes back to high school and falls in love with Chizuru Hishiro, who is more than she seems.
Mio has long hidden her feelings for her childhood friend Arata. After an argument leaves their relationship uncertain, she sets out to reconcile with him but awakens in a mysterious version of Ikebukuro following an accident. Guided by unusual new companions, Mio searches for a way home while confronting the feelings and memories she has avoided.
Problem student Haru Yoshida sits next to the cold and studious Shizuku Mizutani in class. Without any other friends to turn to, both of them start to get to know each other and grow closer. Haru eventually develop feelings for Shizuku and confesses his feelings to her. Will Haru and Shizuku get their happily ever after?
Kyoko, who couldn't believe anything in the world and lived a desolate life, meets Katsuya Honda, who has been assigned as an educational trainee. She is at the mercy of Katsuya, who is rude and has a strong habit, and she is gradually attracted to her. However, she is disowned by her parents in the wake of an incident with her bad fellow. It's a punishment that I've been doing as much as I like. Katsuya appears in front of Kyoko who thinks so...
Taku Morisaki ve Yutaka Matsuno çok yakın iki arkadaştır. Okullarına 2.dönemde Tokyo’dan nakil olarak gelen Rikako Muto adlı kız, gerek derslerde ki başarısıyla gerekse güzelliği ile iki arkadaşın ve tüm okulun bir anda dikkatini çekmeye başlayacaktır. Fakat Rikako okulda sosyal aktivitelere katılmamakta ve kimse ile arkadaşlık kurmamaktadır. Bu yüzden diğer öğrenciler tarafından fazla sevilmemektedir. Buna rağmen Yutaka, Rikako’dan çok hoşlanmaktadır. Fakat Taku, Rikako’ya verdiği borç para yüzünden O’nunla birlikte Tokyo’ya gitmek zorunda kalınca ikili birbirini daha yakından tanıyacak ve yakınlaşmaya başlayacaktır.