It's a shoujo manga, the mc is really strong, works in a cafe, male lead has black hair (maneger of the cafe), 2nd lead has blonde hair (also works at the cafe, same age as mc, has a younger brother) mc and 2nd lead are in school, mc also has an overprotective mother and step father
The only thing that comes to mind is this: https://www.mangago.me/read-manga/shiawase_kissa_sanchoume/
Oh loveeee their lack of communication skills!! It's giving frustration