But I'm the Villain's Little Cub!

"You're the little brat of a gang of interstellar pirates. They rob, kill, and do every manner of evil, but the male lead's family has locked them up." "First, you need to steal the key to the dungeon and rescue your family." "Second, defeat the male lead and become the greatest villain in the interstellar world." "Got it?" Mumu sucked on a finger, listening to the System's instructions with wide, innocent eyes. He nodded in a daze. "Got it! I'll be a bad little brat." The System was pleased. "That's right, that's right." But Mumu found that even though he was being so bad, shouldn't everyone hate him? Why did they all scritch his head and kiss him whenever they saw him? He was a villainous little brat, super fierce! "Grrr!" "Mwah! Mumu, will you be my wife?" The male lead planted another smacking kiss on Mumu's little cheek. Mumu was so cute. Mumu was so angry he burst into tears. "Then can you be scared of me just a little?" As a villainous little brat, he had no dignity at all. Later, Mumu strutted proudly ahead, bragging to the System. "Look, I've already defeated the male lead and become a supervillain!" The System put a hand to its forehead. "..." At last, the palace sensed where the little prince was. But when they found him, he was covered in dust and hanging out with the pirates, declaring, "As the great villain, I'm going to conquer the palace!" Everyone at the palace: "..." Premise: Keep a kind heart and forge ahead.