Please Tell Me the Young Master's Name!

Introduction to the Work: “How many times are you going to preheat? You’re making me impatient.” “…Shall I suck it?” “Huh?” “I think Carol did it this way…” At the mumbled words, the young master chuckled, flicking Sio’s cheek. The young master hadn’t intended to stir things up that much, but Sio’s words made the corners of his lips lift. “It’ll be difficult for you…” “I, I can d-do it… Please… let me.” He had to prove his worth. *** “…I can’t possibly do that to you, Young Master… Hngh!” “The only person who can do that to me…” The young master kissed Sio’s neck. “Is only you.” Does he always speak so warmly to his servants?