
Is there a K-drama show similar to this? Doesn't matter if it's a really old show. Can y'all reccomened me?

If you don’t mind shows about affairs, (considering this manhwa has the sub genre of infidelity) I would say “Love Affairs in the Afternoon”, specifically the first woman’s story who works at grocery. Has themes of the FL’s efforts not being seen/recognized and taking comfort in someone else who also has similar struggles.
Reading the manga was the best decision also bad because it took me almost in the morning and I'm gonna be half asleep at class. But still worth it.