Rivals to lovers

Never Understand:
https://www.mangago.zone/read-manga/never_understand/

Although the rivalry was kind of one sided

Here's an album with these stories..
https://www.mangago.zone/home/album/168418/

"Semantic Error" is my most recommended but you can check here others of the same trope https://www.mangago.zone/home/mangalist/1162208/

https://www.mangago.zone/read-manga/a_shoulder_to_cry_on/?RWuU

nevermore

penthouse

dear Benjamin