"Twinkling Watermelon" is a series that follows the adventures of Eun Gyeol, a high school student with a passion for music, who accidentally travels back in time to 1995. There, he meets his future father, Ha Yi Chan, who is still in high school and unaware of Eun Gyeol's true identity. Eun Gyeol tries to convince Yi Chan that he is his future son, but Yi Chan thinks he's crazy. To make things worse, Yi Chan has a crush on a violoncellist named Se Kyeong instead of Eun Gyeol's future mother Cheong Ah. In an attempt to fix the situation and bring his parents together, Eun Gyeol joins a band led by his future father. But will it be enough to reunite his parents and will he ever return to the present?

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Some TV shows that have similar genres and were produced around the same time as Twinkling Watermelon include Fallout, 3 Body Problem, Severance, The Last of Us, Foundation, The Walking Dead: The Ones Who Live.