I Raised a Planetary Heir in an App

[Raising a child + paper-doll character + mutual salvation] [The protagonist is sensible about spending money at first, then gradually gets hooked. Includes livestreaming elements, starting around Chapter 10.] Yu Xingqiao has suffered from an immune deficiency since childhood and can only live alone in a sterile room. Fortunately, he has all kinds of electronic devices to keep him company. When his nurse recommends a child-raising app, he refuses at first. But after accidentally trying it out His little Jun Lu is so soft and adorable, yet he has nothing at all. How pitiful! I have to buy him everything! Wow, his well-behaved grown-up version is adorable, too. I have to spend, spend, spend! As the son of the richest man in the country, Yu Xingqiao has nothing but money. The imperial crown prince, Jun Lu, is ambushed and loses all his power, forced to revert to his infant form. He conceals his identity and suffers one humiliation after another. One day, something calling itself a System approaches him and asks to make a contract. If he can get revenge, he's willing to offer his soul to the devil! After receiving several "divine gifts," he can't help asking the System what its master wants from him. Does it want his life, or... for him to kill someone? After a long pause, a line of shy little text appeared in the void: I... I want to see your abs (/▽\*) Jun Lu: Huh??? Reading guide: 1. Jun Lu is the top! Younger-man top! 2. Sci-fi and magic setting, with lots of original worldbuilding. It's not pure fantasy. 3. Gentle reminder: Spend moderately, and within your means. Theme: Love and peace