Bleach. Volume 2: Tite Kubo

Ichigo 'Strawberry' Kurosaki was born with the ability to see ghosts. When his family is attacked by a Hallow - a malevolent lost soul - Ichigo becomes a Soul Reaper, dedicating his life to protecting the innocent and helping the tortured spirits find peace.
Immediately after checking into the Kurosaki Clinic with a mysterious scar on his back, the muscle-bound Chad goes AWOL. Accompanying Chad is a talking parakeet imbued with the soul of a young boy named Yuichi. It doesn't take newbie Soul Reaper Ichigo Kurosaki long to surmise that a Hollow must be involved - the strongest spirit he's faced to date. Ichigo is about to discover that not every soul is bound for the Soul Society, especially if it's tainted with innocent blood.