[My Love from the Star] Reborn into the Game

The S&C Group has four sons. In the year he turned thirty-one, the second son, Li Qijing, was killed by his twin younger brother, Li Zaijing. Then he understood a few things: the world he lived in was just a television drama. The S&C Group in that drama had only three sons, and he was someone who didn't exist. With the System's help, he was reborn. Taking it all as a joke, he returned to his childhood. Back then, the sky was still blue, the grass was still green, and the plot had yet to begin. As someone who has died once, he will no longer be the same Li Qijing. All of you who once harmed him, hurt him, and looked down on him, just wait... For the sake of world peace, I have returned! Ahem, I really love You Who Came from the Stars, so I couldn't help writing fanfiction (covers face). Please don't believe the blurb above. Almost none of it fits the story; I struggled to cobble together that nonsense. The author is terrible at writing blurbs, no explanation needed ╮(╯_╰)╭ If you've got some free time, feel free to take a look. This is a 1v1 pairing, with Do Min-joon, Professor Do, as the love interest. There will be some flirtation with other characters and scenes together with them (?), but the ending is a 1v1 with the professor! Theme: