I´m the school beauty´s bodyguard! ITSBD

Theo, an elite mission-addicted killer, returns home after finishing a task. There, his father gives him a mission of a higher level than any he has ever done before.

His new mission... to be a bodyguard!

"What a shitty job that is, old man."

What Theo doesn't know is that old Lin only wants the young man to be able to recover from his illness...