Meet Me Outside and Girls on Rela are both advertisement series with a similar style centered around gay/lesbian dating apps. We also see similar character traits and moments between the two series.
Episode 12 and 13 of the anthology "Girls on Rela" and "I Like You, Unnie" center around a pair of women with a close junior-senior relationship, but find themselves realizing they want more.
Although completely different in tone and purpose, the scenes present in Eunha's flashbacks in "The Fifth Season" remind of a couple of the stories within the anthology "Girls on Rela."
A short film with two young women being friends and one of them trying to figure out if the other one likes her. It is also available on Youtube and also very cute.