Hey! I Have to Touch Either a Fish Tail or a Six-Pack

Or... would it be all right if I touched you somewhere else? [Two male leads / merman top / master-servant contract / mutual salvation / intense possessiveness / taking revenge on scumbags] After being reborn, Yu Shisheng ended up in the body of a hopeless romantic exactly like the one he had been in his previous life. Even worse, this hopeless romantic was on the verge of dying. Worse still, his scumbag former Dao partner looked exactly like Yu Shisheng's scumbag ex-boyfriend! Damn it! Yu Shisheng instantly perked up like he'd chugged an energy drink. While getting revenge on the scumbag, he accidentally rescued a ridiculously handsome merman with silver hair and a blue tail. Most people keep merfolk as furnace vessels or slaves, and the merfolk serve their masters with utmost deference. But Yu Shisheng's merman turned everything upside down. He tried to kill Yu Shisheng the moment they met. After they finally formed a contract, it went like this: “Where's the fish? Feed me.” “Where are you going? Did I say you could?” “You dare touch my abs and tail? Do you have a death wish?” Then Yu Shisheng's butt hurt for days. All he could do was ask the System online: What do I do if my pet is rebellious, bad-tempered, and won't let me touch him? System: Host, we recommend completing the main quest as soon as possible and returning to your original world. But just as Yu Shisheng quickly finished the quest and tried to make a run for it, the merman he had raised imprisoned him in the deep-sea merfolk palace. The merman held the contract pearl Yu Shisheng had spat out and shoved it back in with a sinister look. “You can't go anywhere but by my side.” “Since you like touching me, I'll let you touch me as much as you want for the rest of your life.”