MidnightReader

-Same main actors
-Toxic relationship, but healthier than Burnout Syndrome.
-BL
-Main characters are in the creative field, in TOL, it's filmmaking, and in BS, it's painting and creating an AI.
-Emotional manipulation & Dependency

Cutie Pie has a more toxic romance, but both are Thai BL's that feature music, supportive families, and good friendships. They are also both on the slow-burn side.

-Thai BL
-Time Travel. In Love Upon a Time, it's a physical instead of a mental travel.
-Murder Mystery with more suspects and multiple people at fault.
-Main character death, but also not.
-Main character labeled as "mad/crazy"

-Thai BL
-Physically traveling in Love upon a Time, is between different times instead of parallel worlds
-Murder Mystery
-Main character death, but also not.
-Unique filming locations

-BL
-The main pair in both are next-door neighbors
-Main pair in ISYIMD like to prank/tease each other, while in H2H, they like to compete.
-One of the main characters has dreams about the other (accidents, death, R-rated things, etc.) and is trying to prevent them.
-Both shows have the main characters draw out what they dreamed.
-Surf is in both series (If that matters to you)