Wonwoo. 
When little three year old boy sat in the middle of sandpit, he wasn´t expecting to find a friend.
He just played with his toys and tried to built a castle. That´s when a little girl came to him and asked if she could borrow one of his toys. He just handed it to her hoping she would play with him. But the girl just run away to her group of friends and Wonwoo suddenly didn´t have what he needed to built a castle. Why couldn´t they play with him too? He was the same as them, right? 
At least he wasn´t hurt. As he was expecting, he didn´t made a friend that day. 
But the next day, he came along and changed his whole life.

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This has a happy ending i swear. I just hope my english is readable. If not, tell me so in the comments.
Well, enjoy this piece of my imagination. (I have insomnia and things like this are the results of my sleepless nights.)
Okay, let´s go.