If you enjoyed My Stand-In for the toxic relationship in which a kind person falls for someone who repeatedly manipulates and disappoints then you may like Theory of Love. The first half of the show is about First kinda pursuing his unrequited crush on Khai until things get so bad that he loses hope and gives up, distancing himself from Khai. Then the second half is from Khai’s POV as he realizes his feelings for First and tries to redeem himself. Both stories are about a toxic love interest who redeems himself, both are emotional and tense (though Theory of Love is less serious) and both will make you question your sanity.