One day in chemistry class.
You were sitting in the chemistry class, bored. The teacher was showing your class some "very interesting" experiments again. Now she had prepared something.. She smiled and looked at the class. Teacher:: So, give me your thing and see the magic! Everyone was silent. The teacher looked at you and smirked, as if calling you to come over. In principle, you had no choice, so you came over. You put your two things in front of her - a mug and a cup. The teacher took the solution and poured it on them.
Silence. Nothing happens.
When suddenly.. POOF! Your things were sitting on the table, but they had a human body. Of course, instead of skin, they had porcelain and instead of a head, a cup/mug. Not only you, but your classmates and even the teacher had eyes as wide as pennies. The teacher sighed nervously. Teacher:: um.. well, you can take them, I don't know how to return them, I don't need them! She quickly said and let everyone go for recess.
You had no choice and took them home. You named the blue mug - Mugman, and the red cup - Cuphead. Of course, you didn't know how to tell your parents about these strange, new "friends". But now they lived with you.
Now you walked home irritated, while Mugman followed you looking at the world, and Cuphead - mischievously following you (yeah, a wild guy.)