無論做什麼事情都不順利的主角「武道」，又住在破舊老公寓裡的他，從電視上得知國中時期的前女友「日向」無端捲入幫派火拼而身亡。某天他在月台等車時居然跌落鐵軌，正他以為自己死定了，回神之後卻發現自己回到 12 年前的國中時期。後來又遇上了日向的弟弟「直人」，告訴他 12 年後發生的事實，要求他要保護姐姐，雙方握手之後他又再次回到現代……。
無論做什麼事情都不順利的主角「武道」，又住在破舊老公寓裡的他，從電視上得知國中時期的前女友「日向」無端捲入幫派火拼而身亡。某天他在月台等車時居然跌落鐵軌，正他以為自己死定了，回神之後卻發現自己回到 12 年前的國中時期。後來又遇上了日向的弟弟「直人」，告訴他 12 年後發生的事實，要求他要保護姐姐，雙方握手之後他又再次回到現代……。
Character Design, Animation Director (OP)
Sound Director
Series Composition
Director, Storyboard, Chief Animation Director, Animation Director, Key Animation
2nd Key Animation (eps 1-2)
Music
Chief Animation Director (ep 1), Animation Director (Mechanical Animation Director: eps 11-12)
Script
Production Assistant
2nd Key Animation (ep 2)
2nd Key Animation (ep 2)
2nd Key Animation (ep 2)
2nd Key Animation (ep 2)
2nd Key Animation (ep 1)
Key Animation (ep 2, ED2)
Key Animation (ep 2)
Key Animation (ep 2)
Key Animation (ep 2)
Key Animation (eps 1-2)
Planning (Planning Assistance)
Casting Director
Key Animation (ep 2)
Key Animation (OP)
ADR Director
Background Art (Art Design)
Episode Director
Art Director
ADR Director
Theme Song Performance (ED)
Animation Director (ep 2)
2nd Key Animation (ep 9)
Key Animation (eps 1-2)
Key Animation (eps 1-2)
Production Manager, Producer
Theme Song Arrangement (OP), Theme Song Performance (OP)
2nd Key Animation (ep 2)
Sound Effects
Key Animation (OP, ED2)
Director of Photography
ADR Director
Original Creator
Key Animation (ep 1)
Color Design
Episode Director (Assistant Episode Director: ep 2), Animation Director (Mechanical Animation Director: OP), Key Animation (ep 2)
Key Animation (ep 2)
Assistant Animation Director (OP)
Key Animation (OP, ED)
Key Animation (OP)
Animation Director (OP, ED), 2nd Key Animation (ep 2)
Planning (Planning Assistance)
Key Animation (OP, ED), Assistant Animation Director (OP)
Planning
Associate Producer
Associate Producer
Associate Producer
Associate Producer
Producer
Producer
Producer
Producer
Executive Producer
Producer (Animation Producer)
Art Director (Assistant Art Director)
Producer
Planning
Key Animation (ep 1)
Producer
Editing
Episode Director (ep 1)
Character Design
Amamiya is kawaii!
完結散花～～好看！