MTL - Study Days at Hogwarts - Chapter 122 my heart hurts

He became the Emperor when he was just a boy and was beheaded before reaching adulthood. It was a tragedy brought about by his fate as the first noble wizard.“Ian, don’t be born in your next life.”He thought everything was over, listening to the traitor’s heartless words. He knew, but…“You are a symbol of peace. Where else would you find such honor as a lowly one?”He became the Margrave’s bastard son, whose family went extinct 100 years ago.A lowly, unsophisticated one, destined to be sold as a hostage to the barbarians across the border.

His fiancée, whom he had never met, had just broken off their engagement. He's then betrayed by his girlfriend and schemed against by her lover.His mother's legacy awakens him. No longer content with mediocrity, he transforms into a dragon overnight.

A part-time job contract. He became the cold CEO’s imitation boyfriend. He merely wanted to earn a few small bucks and live a comfortable life, but a pity, he was in constant turmoil since then. Well, life had something else for him despite his wishes.“That… beauty, will there be an increase in wages for conversion from ‘boyfriend’ to ‘husband’?”

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.