Currently Sebastian has prepared himself to go to the Netherlands because his mother invited him to talk alone to discuss college. Sebastian majored in business to continue managing his mother's company. Like it or not, the man had to follow his mother's words because he didn't want any more problems or bad things to happen to him, like during an accident.
"You have to prepare quietly and don't tell Reina in advance. If Reina knew you were going, the girl would obviously be angry because it was too soon for you to go to Holland. Even though there are many things that must be prepared in advance so that Mama does not want to have a misunderstanding here. Mama will also ask Reina to prepare for a transfer to a female-only dorm so you don't have to worry about Reina here anymore because it's definitely safe and comfortable to be in the girls' dorm." Aunt Shelena looks so concerned even though it's all just to convince Sebastian to go to Holland.