Your name is Dave Strider, and you have just turned 12.
So what that your bro wasn't the best, so what that every now and then he hit you or yelled for no reason or forgot to feed you? It just lent him that cool, ironic air of not caring... right? You weren't so sure that was true, but it was still easier to convince yourself of that than to think he actually didnt care.
Up until now, you and him had been strifing and it had been going pretty well. You were getting stronger and faster and only occasionally needed stitches. You were doing pretty good. And your twin brother, Dan, was proud of you for it too. But it went downhill from there, because on your 12 birthday, bro stopped going easy on you.
In fact, everything got worse.