Time Travel·vampire

I, an ordinary junior high school student, have to turn over the table every time I return to my seat because my seat is toward the back and my two deskmates are lazy. This time it happened again. Damn it, this broken table actually collapsed and even knocked me out? When I woke up, I originally thought I would be in the school doctor's office, but when I opened my eyes, I saw patches of blood-red roses, and an eldest sister asked me to serve a young master? Damn it, other people in time travel are the kind of masters who are served, why am I the one who serves others? God is unfair...