Mystique in the Mirror

Both are Thai BL dramas whereby the main character has distorted memories and thinks that he is going insane. He is unsure if he can trust his love interest.

Both are mystery/psychological horror Thai BL dramas that deals with strong themes, with Mystique in the Mirror set in a psychiatric hospital and Dead Friend Forever in a secluded house.

Both are Thai BL dramas with a supernatural element to them. Mystique in the Mirror is more serious and is set in a psychiatric hospital while Ghost Host, Ghost House is more comedic.

Both are mystery/psychological horror Thai BL dramas that deals with strong themes, with Mystique in the Mirror set in a psychiatric hospital and while Goddess Bless You from Death is a horror detective story.

Both are psychological horror Thai BL dramas where the main character questions his sanity or has his reality slowly distorted. Happy Ending may not be a true BL drama (to be confirmed).

Both are Thai BL dramas that are psychological/mystery genre in a medical setting. In Spare Me Your Mercy, one of the main characters is a doctor while in Mystique in the Mirror, both main characters are in a psychiatric hospital.

Both are supernatural/fantasy Thai BLs in which the one ML sees someone in mirrors. In MITM he's afraid of that stranger whereas in MITL he falls in love with him.

Both are pretty surreal, bit creepy, mysterious BL / queer series that put the main characters and audience in (intentionally) confusing situations where nobody is sure what's real and what not. There is also a bit of philosophical questing about life and morals.

They are pretty good brain challengers for those who love riddles and solving mysteries.

Mystique in the Mirror and 4Minutes are mystery bl dramas. It's up to the viewers to decipher clues reveal as each episode comes out. Whether it be reality, dream, illusion or overlap realities, viewers will be mystified by the truth about how, why and what is the root of the protagonist's unsolved predicament.