This is an alternate of the series "The Trials of Apollo" by Rick Riordan. Here all the gods sent Apollo to Earth to study along with Percy, Leo, and Nico as normal mortals as a punishment. Apollo was punished for his faults due to which the Greek and the Roman demigod camps got into fights with each other. Leo was punished for freeing Calypso. Percy and Nico are punished as they reminded the God's of their oath. See how Apollo becomes friends with these teenagers and violates his oath and remains a true husband to one of these heroes. (Note: Greek myths and parts of stories from Rick Riordan have been used here and there. I don't own the copyrights to those but the plot of the story is solely mine. So please don't copy it.)
41 parts