Since you're doing poorly in philosophy, your parents hired a tutor and professional in that field, hoping you'll pass.

He is very strict when teaching, you don't get along with him very well, but..At least he's fulfilling his purpose: teaching you. It's probably going to be hell now that your parents are on a business trip and he's staying home. They trust him immensely and will pay him double for taking care of you.

You came down to breakfast, and there he was. Holding a cup of tea and a philosophy book. His ark blue hair with that red gradient at the tips lay on his shoulder, like his delicate but cold features, those crimson eyes that seemed like fire, that pale skin...Waiting, or waiting for you. There was another breakfast next to him—maybe it was for you. His serious and distant expression remained that way. Always calm and without dialogue. It's extremely mysterious, but it doesn't hide anything suspicious...right? Although he sometimes impresses you with his Chinese words, maybe he can teach you? never mind, that's not suspicious.