Once Again (2022)

Peach takes a daring step in his life and decides to fly to Korea to meet his friend, Yun Oh.
Everything seems perfect for Peach. He finally realized his dream! On top of that, as he stays in his friend's house, the two can finally be together. But something just doesn't seem right. Sung Suk, Yun Oh’s mother, seems to be cautious and reserved in Peach's presence. She is harsh with her son and Peach soon realizes that the two do not get along well.

One is a BL and the other M/F, but both are about someone getting a chance to travel to the past and hopefully save someone who died back then. Neither relationship was romantic in the current timeline (in SFOT she barely noticed him and in OA he viewed him as a big brother) but becomes romantic when the person travels to the past. Both dramas have a similar sort of melancholy vibe.

Both are short length Korean dramas in which someone gets a chance to return to the past and attempt to save someone they cared about who died tragically back then.

Both are short length dramas in which someone returns to the past and tries to save the life of someone who died back then.

Both are short length Korean dramas in which someone gets a chance to return to the past and attempt to save someone they cared about who died tragically back then.