Chase's Favorite

I need a manga to read involving MC hiding his strength and pretends to be weak or MC takes someone else identity and transfer to school or work.
I already read:
http://www.mangago.zone/read-manga/lookism/
http://www.mangago.zone/read-manga/unordinary/
http://www.mangago.zone/read-manga/noblesse/ (they dont really hide their power or pretend to be weak)
http://www.mangago.zone/read-manga/black_haze/
http://www.mangago.zone/read-manga/tower_of_god/
http://www.mangago.zone/read-manga/dokgo/
http://www.mangago.zone/read-manga/flow/ (I did not really like it)
http://www.mangago.zone/read-manga/geu_kkeute_issneun_geos/
and I perfer not having to much romance. Here and there I'm okay with but dont let it be the main focus of the story.

Any manga where the seme or uke have an extreme maekover after they were mocked or made fun of and they become popular? .. what? I like these kinds of clichés.. ┑(￣Д ￣)┍

It's where the uke had to euthanize his cat because the cat was old. Seme works at a cat rescue center / cat shop. Uke wanted to adopt new kittens. Seme, however, was a bit skeptical about the uke adopting kittens. He thought the uke was just going to
abuse the cats. Anybody know the title? Thanks in advance!