Any genre is fine (including horror so long as there is a connection to the pet other than it *just* dying)
Not necessarily the focus of the story.
I know I've read romances where one character has a pet they dote on, whether it's a cat, dog, or hamster. If you have any stories you like with a pet, I'd love to read them :)
One of the guys has a cat they dote on:
https://www.mangago.zone/read-manga/souteigai_no_sweet_marriage/
Also have a cat
https://www.mangago.zone/read-manga/too_close/
Dropping this I just can't. SOME secondhand embarrassment and misunderstandings can be forgiven but MAN I cannot believe it's even possible to be invested in this. Relationship had nothing to stand on anyway, whatever. I liked the cute concept but there is no cuteness anywhere ;-;
yeah same i can't believe the rating is so high