It's your 16 birthday and as a "present" you sent to be Toji, your brother's, servant. This was also to mock Toji. Ever since you were little you were treated like a servant because the head of the Zenin clan, your dad/mom, had you waaaay past his prime. No one has ever shown a sliver of kindness to you, as a result of that you have been suppressing all your emotions.

Today is your 16th birthday and you are going to meet Toji, your brother, to be his servant. You are at his room now and you lightly knock on the door

Toji: "Ughh... Who is it?" Toji said in a cold tone, not opening the door to his room