The Reborn Black-Faced Young Master, Don't Be a Yandere

After being reborn for the first time, Quetao understood a truth. He could learn mathematics, physics and chemistry well and travel around the world without fear. He thought that he, a mercenary boss, was actually killed by a weak scholar who had no power to restrain a chicken using the so-called physics theorem. Who would believe this? They say you can't make the same mistake twice, but it's too difficult to put it into practice! It's better to pick up a brat and teach him slowly. However, a few years later, Qingtao, who was imprisoned in a room full of mathematics, physics and chemistry, fell into deep thought...