From SergeantMeow of RMWT’s kids!Johnkat AU where John is the friendly and brave kid who protects Karkat from bullies in the park. They become close friends and Karkat grows up to be someone strong and dependable. 

We were hitting so many shounen cliches, that’s how Sgt came up with the title 夏の半ばのヒーロー

It’s all sorts of heartwarming and cute. Even more so with the shounen cliche. There’s more to the story and here’s hoping one day the story will be a thing.