Douluo Dalu: After Replacing Tang San, I Became a God by Doing Nothing

I transmigrate to Douluo and take Tang San's place. I thought I'd have to follow his thorny, tragic path, but the System told me: [Host's strength will be linked to “the real Tang San” and increased threefold.] From that moment on, I understood. My path to godhood would be simple, boring, and uneventful. He would handle the hard work, the struggle, the fighting, and the near-death experiences. I'd take it easy, fall in love, lie flat, and reap the rewards. But gradually, I realized things weren't that simple. How is this taking his place? Isn't this just me being his “deadbeat dad”?! Not only do I have to secretly take care of him and slip him opportunities, worried that he'll grow too slowly and hold back my leveling speed, I even have to find a way to reignite his hope every time I beat him like a dog in front of Xiao Wu and the other girls. He absolutely can't lose heart and lie flat for good! I'm so busy! I thought being his “deadbeat dad” was exhausting enough, but I never imagined those girls would give me even more trouble! Come on! All I want is to lie flat in peace! Why do I have to be so hands-on about getting stronger?! [Also known as “Me, Tang San's Dad, Raising a Child Online” and “Girls, Stop Knocking! I Just Want to Sleep”] [Multiple heroines, Tang San gets tormented, the Grandmaster gets tormented]