Responses
I'm sure I've read some, but I can't find them, this are the closest I found:
https://www.mangago.me/read-manga/love_me_better_than/
https://www.mangago.me/read-manga/small_dick_curse/
https://www.mangago.me/read-manga/instant_x_love/
https://www.mangago.me/read-manga/accidental_baby_1/
https://www.mangago.me/read-manga/the_position_has_changed/
https://www.mangago.me/read-manga/i_m_banging_my_rival_from_a_parallel_world/
Mangas where one of the characters thought they were together but the other didn't know