Teoria do Amor (2019)

Both have MLs who have a crush on their friend who dates a ton of girls in school but never gets serious with any of them.

Similar trope of unexpectedly falling in love. Both have a star couple with great chemistry as main focus. Also a really amazing well made stories.

Both series have very similar plot lines between the main characters. Love to hate to inevitable destined love and learning what it means to love. Theory of Love would be PG-13 where as History: Obsessed gets a solid R rating. Both are entertaining with the Theory of Love being more of a RomCom where History:Obssesed is a full on drama.

Similar themes of young adult love, school, exploration, relationship drama and coming of age.
University students in similar situations.

Both are school setting BLs with an unexpected endgame pairing.
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both pictures take place in university, have a main character who wants to work in the film industry, focus on a bittersweet friends to lovers story & have a jaded but sassy voiceover. they both have extremely similar vibes in my opinion.

The plot of two dramas are different, but they both portrays the tension and struggles in the relationship between the 2 male leads. These two stories stand out of the rest of the Thai BLs from GMMTV. The acting and the story made you become vey invested in the characters and want to see what decision they will make in the end.