貌似無辜小生的主人公長瀨準一和妹妹長瀨湊一起過著只有兩人的平凡生活。一天傍晚，準一在街上救了一名被不良少年拉住的少女，事後不但忘記告訴少女自己的名字，同時還被倉皇逃去的不良少年喊出了當初的黑暗稱號「下中的Genokiller」。 第二天，準一的班上來了一個轉校生，她正是準一前一天所救的少女：片桐優姬，片桐財團的大小姐。兩人成為了朋友，但是在損友的鼓促下，當著全班的面吻了優姬，因而被她討厭，但當天傍晚優姬卻出現在準一家門前，並透露了婚約之事，之後展開了三人同居的日子…
貌似無辜小生的主人公長瀨準一和妹妹長瀨湊一起過著只有兩人的平凡生活。一天傍晚，準一在街上救了一名被不良少年拉住的少女，事後不但忘記告訴少女自己的名字，同時還被倉皇逃去的不良少年喊出了當初的黑暗稱號「下中的Genokiller」。 第二天，準一的班上來了一個轉校生，她正是準一前一天所救的少女：片桐優姬，片桐財團的大小姐。兩人成為了朋友，但是在損友的鼓促下，當著全班的面吻了優姬，因而被她討厭，但當天傍晚優姬卻出現在準一家門前，並透露了婚約之事，之後展開了三人同居的日子…
Key Animation (eps 5, 12)
Special Effects (ep 6)
Assistant Producer
Animation Director (ep 9), Key Animation (ep 9)
Animation Director (ep 7), Key Animation (eps 9, 12)
Script (ep 7)
Script (eps 3, 6)
Episode Director (ep 8)
Theme Song Composition (OP)
Storyboard (ep 7), Episode Director (eps 2, 7, 11)
Key Animation (eps 9, 12)
2nd Key Animation
Character Design
Key Animation (ep 12)
Theme Song Arrangement (ED8)
Original Creator
Theme Song Performance (ED eps 4 & 6)
Theme Song Performance
Theme Song Performance (ED10)
Theme Song Performance (ED)
Theme Song Performance (ed8)
Theme Song Performance (ED1, ED4)
Key Animation (ep 10)
Theme Song Arrangement (ED10)
In-Between Animation (ep 8)
Key Animation (ep 4)
Animation Director (ep 6)
In-Between Animation (ep 6)
Key Animation (eps 4, 10)
Key Animation (ep 2)
Producer
2nd Key Animation (ep 12)
In-Between Animation (ep 3)
Animation Director (eps 4, 10)
Music
Key Animation (OP)
Key Animation (ep 2)
Theme Song Lyrics (ED1, ED2, ED4, ED6, ED8, ED9, ED10)
Script (eps 2, 4, 9, 11)
Key Animation (ep 12)
Storyboard (ep 11), Key Animation (OP, ep 1, 7)
2nd Key Animation (Sung San Animation), Key Animation (ep 6)
Original Character Design
Storyboard (ep 3), Key Animation (eps 3, 12)
Editing
Director, Storyboard (eps 1, 9, 12, OP, ED), Episode Director (eps 1, 5, 9, 12, OP, ED)
Script (eps 1, 5-6, 10, 12), Series Composition
Theme Song Arrangement (ED4)
Episode Director (ep 6)
Storyboard (ep 9)
Key Animation (ep 7)
Key Animation (ep 6)
In-Between Animation (ep 8)
Key Animation (eps 5, 7, 10)
Key Animation (ep 7)
Key Animation (ep 2)
Key Animation (ep 9)
Key Animation (ep 11)
Episode Director (ep 4)
Background Art (eps 1-2, 5)
Original Character Design
Key Animation (ep 8)
Art Director
Special Effects
Key Animation (OP)
Theme Song Lyrics (OP, ED3, ED5, ED7, )
Original Character Design
Chief Animation Director
Key Animation (eps 1, 11)
Theme Song Arrangement (OP)
Sound Director
Character Design
Theme Song Performance (OP)
Storyboard (ep 6)
Key Animation (ep 6)
Key Animation (eps 4, 6)
Planning
Animation Director (eps 5, 11), Key Animation (eps 9, 12, OP)
Animation Check (ep 6)
2nd Key Animation (ep 6), Key Animation (ep 6)
Key Animation (ep 4)
Animation Director (ep 3)
Key Animation (ep 2)
Key Animation (eps 4, 10)
Key Animation (ep 2)
In-Between Animation (ep 8)
Key Animation (eps 1, 11, OP)
Key Animation (eps 5, 7)
Key Animation (ep 10)
Key Animation (ep 10)
Special Effects (ep 12)
Key Animation (eps 1, 11)
Key Animation (ep 2, 11)
Special Effects (ep 2)
Planning
Key Animation (ep 2)
Key Animation (ep 2)
Episode Director (ep 10)
Amamiya is kawaii!
完結散花～～好看！