Oculama

Your average overworked salary-man, Kuro Kumon was working overtime one night at the request of his supervisors. Minutes before finishing the night's work, he heard as sound behind him, and before he knew it the room was filling with a mysterious gas. That is the last thing he remembers before waking up in an unfamiliar location with a mysterious briefcase handcuffed to his wrist.
Despite his large stature, Kuro is a gentle, humble, trustworthy, and reliable person; qualities his peers frequently take advantage of. He would never, ever even dream of killing another person, hopefully no one makes him do that.