To be honest, they're the type of couple who's not reak of toxicity. They talk and communicate if each one of them is in trouble. This is what you need as a foundation, communication is the key
http://www.mangago.zone/read-manga/koi_to_yobu_niwa_kimochi_warui/
I feel like this one is kind of similar, maybe I'm wrong.
Here is one that has been recommended to me:
http://www.mangago.zone/read-manga/otome_game_no_hametsu_flag_shika_nai_akuyaku_reijou_ni_tensei_shite_shimatta/
I NEED THE RAWS OR I WILL DIE-------
Here you go http://webtoon.daum.net/webtoon/viewer/77695
Hope you enjoy it :)
Ugh I just hate myself for hating the side stories knowing author-nim wants it. I'll read it as a respect for the author but not for that b!tch