Title?

This was a (probably shounen ai) webtoon about a dude who plays a holographic/AR irl sorta game about raising a child. He has to choose a spirit from the horde of spirits and this one spirit comes to him and the mc chooses this spirit and ends up becoming the dad of a really cute blond boy. The mc's backstory in the story is that he was a hero and now kinda poor. There's kinda sus butler who acts as the system. He makes two friends, a bookshop owner and the sword master from his son's school. The son turns out to be a golden dragon.

Pls help me find this book, idk why i didn't mark it as reading but now i can't find it at all QAQ