JoJo's Bizarre Adventure

Riding his bike to school, Koichi accidentally runs over a bag that was in the road that had a cat inside. Koichi is instantly overwhelmed by what happend. Then suddenly, a man named Tamami Kobayashi appears. Despite it being an accident, he demands money from Koichi, saying that he'll use it to bury the cat. Koichi can't process what's going on, but Tamami keeps pushing that he can't just leave after what happened. Koichi is filled with guilt, and then suddenly, a giant lock pops out of his chest...