Angelo's Stand ability was brought forth by the mysterious bow and arrow, and apparently they're also connected to DIO. After defeating Angelo, Jotaro thought that the danger had left the city, and tries to find the whereabouts of the bow and arrow. A few days later, Koichi is walking home with Josuke, and they pass a house that should be empty...
I hate to disappoint you, 
but I'm not Joseph Joestar.
يؤسفني أن أخيّب أملكِ، لكنني لستُ جوزيف جوستار
Ich liebe dich, ich liebe dich, ich liebe dich,
ich liebe dich, ich liebe dich,
Lamento decepcionarte,
pero no soy Joseph Joestar.
Lamento decepcionarte,
pero no soy Joseph Joestar.
Désolé de vous décevoir,
Mi spiace deluderla,
ma io non sono Joseph Joestar.
Odeio te desapontar, mas 
não sou Joseph Joestar.