In case you didn't know the story of the Sakuyama, the Santa and the one that calls him Young Master has a story when he was in high-school here https://www.mangago.me/read-manga/say_hello_to_my_embarrassing_past/
In case you didn't know the story of the Sakuyama, the Santa and the one that calls him Young Master has a story when he was in high-school here https://www.mangago.me/read-manga/say_hello_to_my_embarrassing_past/