One Piece : Roger Is My Vice Captain - Chapter 15 - Is your family dead? I

Mason was a mercenary, until the day he died on a mission after being betrayed by his unit.

Short, rich, and handsome, Lin Feiran was always the center of attention. But after transferring schools in his second year of high school, he discovered that his limelight was snatched by his Adonis classmate, Gu Kaifeng.

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

There was a turtle here,He was a bandit! A robber! A shameless scoundrel!Don't mess with him!