One Summer Day [ Official ] summary: It's not every day you become a ghost. Han Seowoo thought he had it bad when the sunbae he liked rejected him. But on his way back home with a broken heart, he ends up slipping from the top of a building and plummeting to his premature death. Then a surprisingly young grim reaper shows up to collect his soul. But luckily enough, the reaper messes things up and Seowoo is given the chance to stay in the corporeal world for a bit longer.   There's just one catch; the reaper is to move in with Seowoo and make sure he stays out of trouble and the lives of the living. Maybe that one summer day, death wasn't the only thing in store for Seowoo…