Responses
The best fit I can think if
https://www.mangago.me/read-manga/did_it_work/
Not that small but I really like this one
https://www.mangago.me/read-manga/summoning_a_bl_fan_to_another_world/
I didn't really like this one but it fits the description https://www.mangago.me/read-manga/senza_replica/
Looking for more comedy BLs with Grumpy/Gremlin Like/Angry/Short characters.
Some examples are the MCs in:
Don't Mess With the Puppy! and Himitsu ni shiro yo!!
Something where the relationship dynamic is either:
"Only this one dude can calm down this gremlin"
or
"Look at my gremlin wreaking havoc. Let me unleash him upon the world"