Gloomy Bear: Babyhood Edition
Gloomy, an abandoned little bear, is rescued by Pitty (the little boy) by Mori Chack. At first, he is cute and cuddly, but becomes more wild as he grows up. Since bears do not become attached to people like dogs by nature, Gloomy attacks Pitty even though he is the owner. So Gloomy has blood on him from biting and/or scratching Pitty.