21 Days Theory (2022)

Similars

What If

6.2 2022

Same cute, simple and uncomplicated storyline. There's not much going on, the story is not complicated, but it's refreshing at the same time.
Both depict a rivals-to-lovers storyline between a feisty, hot-headed boy who is always coming 2nd or losing to the popular, calm boy who is actually secretly in love with him and has only achieved his accolades because he wants the other boy to notice him.
2 Moons

7.3 2017

This drama also a set of university and The students concentrate on one concept/activity in their university like becoming university moon, This drama is also a worth a watch.
Blueming

8.0 2022

They're both set in school, and deal with some family issues that don't usually get brought up much in BLs. Blueming is a bit more serious about it in how they deal with theirs but both are surprisingly realistic in how they approach the issues. As a result, both series have a lot of heart in them through the sense of honesty in how both are written and how the plot progresses. Blueming is a little more bittersweet and serious than 21 days but still ends happily, plus they have more kisses and sweet moments between the couple. Both shows also have a one sided enemies/rivals to lovers main pair with a prickly tsundere.
set in high school. secret crush. supportive friend/s. one sided rivals to lovers. idk they just give off the same type of vibe