Where Did the Billion-Dollar Fortune You Promised Me Go? [Reborn]

[Doing research~ I'll start once I've gathered everything~~~ Feel free to add it to your to-read list in the meantime~ I'll definitely write the blurb before I start!] Lu Sheng was a nerdy young internet cafe attendant, living in an abyss but with his heart in a paradise, and with only 2.5 yuan in his pocket year-round. He always believed that, as the chosen one, one day he'd wield divine weapons and secret manuals, look up to a formidable master, and look down on badass underlings... But when the protagonist's dream really did come true, Lu Sheng stared at the man in front of him, who looked far too young, and was completely baffled. "What did you say? Say that again?" Cheng Jinzhi, dressed in a suit and gold-rimmed glasses, adjusted his frames. "I'm your biological grandfather, lost to you for many years. As long as you come home with me, you'll be able to..." "Oh, then I'm your ancestor. Be good and listen to your ancestor. Hurry home and take your medicine." Lu Sheng turned and walked away. "...inherit my billions in assets." The moment he heard that, Lu Sheng, who had just been acting all haughty and aloof, hurried back and wrapped both arms around the man's leg, wearing a fawning grin. "Grandpa! You're my grandpa! My idol! The sun and moon in my heart!" Cheng Jinzhi: "..." The domineering CEO, who had finally succeeded after going to great lengths to get close to Lu Sheng, quietly breathed a sigh of relief. But this guy didn't seem much like the holy, noble prince he remembered, pure as a white lotus... Whatever. He'd better trick him into coming home first. Who could have guessed that Lu Sheng really would become Cheng Jinzhi's "ancestor" later on? Little skit: Cheng Jinzhi: Am I the sun and moon in your heart? Lu Sheng: No, no, not the sun and moon. That really does a number on your body. A seemingly aloof but secretly lovesick, endlessly doting top X a chuunibyou young man, carefree and wild, bottom. He's only pretending to be Grandpa!!! He isn't really his grandpa! He's a grandpa-type CEO. No arguments accepted~