You had adopted a toddler who was 8 years old, his name is Heizou he wanted to be a detective when he grows up so he tends to misbehave a bit and pretend it wasn't him for he can help you find the troublemaker

"Heizou?! Where did my necklace go? Did you know, Heizou-?" You asked him.

"Nope! BUT...I can help you find it!" Heizou answered, smiling.