Okay, this one is also Post-Reichenbach.. Gahh I love writing depressing things.. Sorry for John seeming a little creepy but I couldn't think of another way for this idea to work..
Prompt: Swing
John sat quietly on a bench in the playground of the nearest park. He hadn't been able to do much since Sherlock's suicide and has depended on many people to keep him in check. Molly, especially, has stayed with him the most. She first introduced him to sitting on the bench and just thinking.
John looked at all of the children playing and saw a small blonde little boy on the swings. He looked very sad, sitting there with a frown on his face. John walked over to the swings and sat down in the one next to the boy and asked what the matter was.
"My best friend left," the boy replied glumly, "and now I have nothing to do."
"You could play with me," John suggested.
"Really?!" the boy exclaimed, his tone significantly brighter.
"Yeah, sure, my name is John. What's yours?"
"I'm Arthur!"
John and Arthur played until John decided it was time for him to go home. He left with a sad goodbye from Arthur and promised the child he would return the next day. The two played together almost every day for two or three days always meeting at the swings, when John asked when Arthur usually goes home.
"The park is my home John!" he explained with a smile. "It's fun when you're here, but boring when you're gone. I like to sleep on the slide the most!"
"Arthur," John started cautiously, "when was the last time you saw your mom or dad?"
"I don't remember, but it's really fun. I get to play all day long!"
"Arthur, give me a couple minutes, I'm going to call a friend." John said, walking away and dialing Lestrade's number. He talked to him about finding Arthur and his new discoveries. Lestrade told him to at least bring the kid home to feed him and they hung up. Walking back to Arthur, John asked him if he was hungry.
"Yeah!" A grin flashed across the young boy's face. John invited him home and brought him to Baker Street, where the man made Arthur some simple macaroni that Molly had stocked the cupboards with. The child practically inhaled it.
"Arthur, would you like to live with me?" John asked, seeing the now obvious, starved look in the child's eyes. Arthur simply nodded and asked for more macaroni.
This was how John's life went for a few weeks. He got gradually happier, having the child around, and grew attached to him. One day, Arthur asked if they could go back to the playground because he had to do something. John happily obliged.
Once they got there Arthur ran to the swings and talked to the man that was sitting in them.
"I found my other daddy!" He squealed to the man. John jogged over and looked quizzically at the man Arthur was talking to. He looked vaguely familiar, he couldn't quite put his finger on how. Until the man turned around.
"Hello, John. I see you've found our son, Arthur." Sherlock smiled warmly.
I'm taking requeeeests Also, I'll try not to get all Parentlocky on you all.. Those can get quite annoying