In 2023, Eun Gyeol is a high schooler with a passion for music. During the day, he is a studious model pupil...but at night, he rocks out as a guitarist in a band. But when he stumbles across a strange yet alluring music store, he goes hurtling back in time to 1995. Here, he comes face to face with his father Ha Yi Chan β as a high schooler! Yi Chan takes Eun Gyeol for a lunatic when the latter calls him βdad.β Worse still, it looks like Yi Chan has a crush on an icy cellist named Se Kyeong β not his future mother Cheong Ah! In a bid to put things βright,β Eun Gyeol joins a band fronted by his future father. But will this be enough to help Eun Gyeol bring his future parents together...and will he ever get back to the 2020s?