The old tsundere tag manga name?

Ok this has been driving me up a wall for some time now and I’m finally reaching out. Anybody remember what the manga the old tsundere tag pic (pre subscription fakku) was taken from? A brief plot synopsis is basically your run of the mill loud mouth tsundere beats up on main oc dude, said tsundere drops love letter, oc picks up letter and proceeds to read it to make fun of her, after reading realizes it was meant for him, feels guilty about making tsundere cry, and then vanilla love making ensues on the rooftop. It is driving me nuts not being able to remember the name and if anybody would ease my suffering by giving me the title I would be eternally greatful. I know somebody knows and that person would be awesome if they passed on their knowledge.

Thank you very much!