What if you could rewrite your greatest regret? In the riotous comedy Goodbye Mr. Loser, Shen Teng stars as Xia Luo, a down-on-his-luck man drowning in middle-aged disappointment, whose monotonous life is a far cry from the dreams of his youth. After a bizarre twist of fate, he finds himself transported back to his high school years in the 1990s, presented with a golden opportunity to alter his destiny and finally win the heart of his longtime crush, the school belle played by Ma Li. Armed with knowledge of the future, Xia Luo sets out to reinvent himself as a cooler, more successful version of his former self, navigating the hilarious pitfalls of reliving adolescence while trying to secure the perfect future. Directed by Yan Fei and Peng Damo, this laugh-out-loud journey through time blends slapstick humor with a surprising dose of heart, as Xia Luo discovers that changing the past is far more complicated—and chaotic—than he ever imagined.