Hyde & Closer v01 (2010)

When only your chainsaw wielding magical teddy bear can save you...
Shunpei Closer has low self-esteem and doesn't seem to be good at anything. His teddy bear, Hyde, was a gift from Shunpei's grandfather, Alsyd Closer, who was the King of Sorcerers. After a mysterious attack, Shunpei learns that he is the target of sorcerers all over the world. With Hyde as his main protector and teacher, Shunpei must learn how to gain confidence in himself and use the magic that he has inherited to battle the dark forces that now threaten him.
With cursed dolls coming after him one after another, Shunpei Closer's life is in danger! If that weren't enough, his favorite teddy bear, Hyde, suddenly comes alive to rescue him. With Hyde's help, can Shunpei save himself and live to see another day?