Indented.

His lowest left rib has a inwards dent from the amount of times Sebastian has broken the bone.

The dent in his torso is roughly an inch deep, five inches long, and an inch and a half in height. It is positioned where his lowest left rip is, it stops that area his torso being a smooth curve like the rest of his torso and turns it into an ‘m’ shape.

The First Monastery: Part One.

Summery: Tyson is injured badly and Sebastian can not get him to a hospital so takes him to the monastery, who take them in and help patch up Tyson.
Story under the cut, as always this was a collaboration with Peter to ensure Sebastian is in character.

Side note / head canon from Peter: Sebastian refures to Tyson as the boy because of the age gap between them.

Part Two.