What is the pun here?

FWP said:

What is the pun here?

It seems to be based on switching the characters 'cha' and 'ma' in his name around to make 'mamacharu' which sounds similar to mamachari (mom bike).

I am not sure if she is a minigirl or if its just a perspective thing

Man, dat pun game!

God, you three are all total messes.

I HAVE NO ULTERIOR MOTIVES.

because i make it plain as day what my motives are.

LOWER THE PANTS!!!