Hedgehog is very good in hiding himself.
One day, Bison see Hedgehog lean against the cushion and ask him,
Bison : what are you doing here?
Hedgehog : Huh, you can see me? I am hiding myself and,
Bison : -_-|||
Since both of them got similar skin color, they become very good friend.
And, hide themselves everyday. Does anyone see them??