故事以日本的「池袋西口公園」作為故事核心，描述高工畢業後在家當米蟲的真島誠，因為絞殺魔事件成為公園裡的金田一。他為了找出絞殺魔同時解開好友理香的死謎，以及受託尋找同學猴子愛慕的黑幫公主，而化身多種角色出入黑白兩道「辦案」。最後他逐漸解開各個謎題，更將變調的公園回復成原有的和平，讓紅藍兩幫派握手言和，過程驚險萬分終於智取謀成。G少年、紅天使、援交妹、自閉少年…… 所有在世俗社會迷失座標的青少年，都在這座公園烙印下青春顏色，並發現自己的價值。
故事以日本的「池袋西口公園」作為故事核心，描述高工畢業後在家當米蟲的真島誠，因為絞殺魔事件成為公園裡的金田一。他為了找出絞殺魔同時解開好友理香的死謎，以及受託尋找同學猴子愛慕的黑幫公主，而化身多種角色出入黑白兩道「辦案」。最後他逐漸解開各個謎題，更將變調的公園回復成原有的和平，讓紅藍兩幫派握手言和，過程驚險萬分終於智取謀成。G少年、紅天使、援交妹、自閉少年…… 所有在世俗社會迷失座標的青少年，都在這座公園烙印下青春顏色，並發現自己的價值。
Animation Director (ep 9)
Storyboard (eps 2, 6, 8, 10, 12)
Producer (Work Producer)
Animation Director (ep 12)
Animation Director (ep 9)
Theme Song Performance (ED)
Music
Director of Photography
Character Design (Sub-Character Design), Animation Director (eps 3, 6-7, 9, 11-12)
Storyboard (ep 4)
Character Design (Sub-character), Chief Animation Director (eps 2, 5, 8, 11), Animation Director (ep 2)
Key Animation (OP)
Storyboard (ep 7), Episode Director (eps 2, 7)
Storyboard (OP, ED)
Sound Director
Series Composition
Producer (English version)
Key Animation (ep 2)
Animation Director (ep 9)
Episode Director (eps 4, 11)
Episode Director (eps 6, 10)
Animation Director (ep 12)
Director
Art Director
Theme Song Performance (OP)
Character Design, Chief Animation Director, Animation Director (ep 2, OP)
Animation Director (eps 1, 3-7, 9, 11-12)
Animation Director (eps 2, 5, 9, 11)
Episode Director (eps 3, 8)
Animation Director (eps 11-12)
Producer
Executive Producer
Animation Director (eps 5, 10)
Animation Director (eps 2, 5, 7, 10-12)
Producer
Executive Producer
Animation Director (eps 9-10)
Producer
Executive Producer
Producer (Work Producer)
Producer
Assistant Producer (English version)
Producer
2nd Key Animation (eps 2-3), Key Animation (OP, eps 7, 10, 12)
Key Animation (OP, eps 1, 4, 7, 10)
Animation Director (eps 8-10)
Color Design
Episode Director (ep 9)
Animation Director (ep 5)
Chief Animation Director
Editing
Episode Director (ep 5)
Theme Song Performance (ED3)
Music
Storyboard (eps 5, 9)
Original Character Design
Original Creator
Amamiya is kawaii!
完結散花～～好看！