After Jotaro had researched a bit, he had a hunch where Kira was living now. He gave Josuke a note with the address on it and sent him there to find out if Kira was still there. Unfortunately, Josuke didn’t read the note correctly and instead of going to Kira, he was at the front door of your house. Through a window Josuke entered your house, still unknowing it was yours. Even though he tried to be quiet, there were still a few noises he caused.