Frog's manga / #Bodyguard(1)

so the story is abaout 2 families that have history of master and servant kind of thing so the characters is prince and his knight they love each other from the beginning like from being a childern and still reamin to highschool days, there are some niedomówienia and guy from the past but in the end they confess they true feelings and becomoe lover there are also kinda sequel of: Hiyo-chan Koi wo Suru? - where 4 of they go on a trip on vacation -ch 4,5