Both are very short dramas in which the leads meet daily on the bus.
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Both are nostalgic settings and focus on the families who live in a neighborhood in the 80s or 90s. Both have a similar feel.

Both are short Korean dramas with ASTRO portraying the characters. Both are light, fun, and have a similar style.

Both have a nostalgic 80s or 90s setting in a small neighborhood and local school, with a love triangle between the FL who is outgoing and lively and the ML and SML, one of whom is her childhood friend and the other a new arrival to the school/neighborhood. Both have a similar feel and tone, dealing with the hardships and experiences of the characters.

Both are historical stories about two friends with different statuses who end up enemies due to choosing the opposite side of some conflict.

Both are light historical dramas in which the FL works for an escort agency. Both MLs are very devoted to the FL and are at one point poisoned and later cured after almost dying.

Both FLs are former/current assassins who work for an escort agency. Both are historical dramas.
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Both FLs have face blindness and are quite isolated initially as a result.
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You Are Vitamins in My Routine is the sequel to You Are the Cream in my Coffee.
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Both involve a semi-dystopian setting and desperate people playing games to the death to win money prizes.

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Both FLs are powerful and skilled in magic, and end up transferring their souls into the body of a weaker, powerless girl. The original body is burned, and then end up aiding the ML as well as being under his protection.