Growing up, Eun Hae-il is unable to forget the boy he had his very first crush on. This year, he gets accepted into his dream college after retaking the entry test 4 times. However, one day he saves a child from drowning in the ocean but, attempting to save him, he submits to exhaustion and drowns. When he closes his eyes, he becomes in a state where he cannot breathe no more, he thinks about a boy that he had a long crush on, but when he opens his eyes and he notices he isn't drowning and was on the bus the entire time and thought he was a ghost. Hae-il, a man who has crossed between time and has survived death, now stands in front of the man he has longed loved, Yoon Pado. “Has God really given me a second chance?”