The Female Friend Among Guys (2020)

Both are mini dramas with a bantering childhood friends to lovers relationship between the main couple.
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Both are childhood friends relationship, with the leads now in high school. Both are either a trio friendship or a love triangle (one FL, two MLs).

Both are short length dramas with a similar plot and feel, made by the same company. Both seem to be connected, with GITMG a sequel of sorts.

Both are mini dramas with a school setting and a trio friendship (two guys, one girl) that began in childhood and now has a hint of romance between the girl and one of the guys.