beta
i remember i think they were in high school and they visited an aquarium one of the girls had pink hair and the other girl had black hair
This one has characters matching your description and there is a chapter where they visit an aquarium: http://www.mangago.zone/read-manga/eventually_i_will_become_yours/
the art style looks so familiar for sum reason
It kind of reminds me of BJ Alex but I'm not sure, I get what you mean though
Kinda reminds me of 'Oh my assistant '