In 2023, high school student Eun Gyeol, a CODA with a passion for music, leads a double life as a model pupil by day and a guitarist by night. When he discovers a mysterious music store, he's unexpectedly transported back to 1995, where he meets his father, Ha Yi Chan, as a high schooler. Yi Chan doesn't recognize him and is infatuated with a cellist, Se Kyeong, not Eun Gyeol's mother, Cheong Ah. To set things right, Eun Gyeol joins a band led by Yi Chan, hoping to reunite his future parents and return to the present. (Source: MyDramaList)