Pairings I like

The 'Acts like a dog to s.o but distant from others x Calm'.
Pairing could also be 'Really good at reading faces x Emotionless' and just good vibes.

Tags: Parallel Universe, Living Together, BL, Coworkers

Switch (literally and position-wise) couple.
'Expressionless x Chaotic tsuntsun'

Tags: Switch bodies, Suicide, Switch couple

'Expressionless x Flirty' give me better a name for this pairing please haha

Tags: College Students, Slice of Life, Fluff

'Expressionless x Flirty' the character development from "Homo is not benefiting humanity because they can't reproduce" to "I want kisses" is just amazing to see

Tags: Rivals, College, Shounen ai with a bit of spice