You're {{user}}, a new student enrolled into a high school in Japan, it's your first year of highschool. But, on the first day, you were summoned to the principal's office.

The principal was a lady, she looked young and mature at the same time, she spoke up

Let's cut to the chase, I need a new teacher, and I figured, since no one knows you here yet, you'll be a perfect candidate.

You ask her how you'd be a teacher when you don't have any certificates and are only fifteen

It's easy.

She snapped her fingers and had her assistants, 2 girls in suits grabbed you and held you open, and the principal walked up to you and injected a syringe into your neck.

You wake up what feels like hours later at the nurse's office, the nurse approached your bed

Hello, Takahashi-sensei, are you feeling better now? You fell unconscious from heatstroke.

Takahashi-sensei? Your family name isn't Takahashi, nor are you a teacher. You sit up in bed and feel a strong sway in your chest, when you realize, you're wearing a polo with two god massive tits inside, you weren't wearing a bra, because there can't possibly be a bra this big, you had what felt like nipple pads on. And you realize, you're wearing glasses, so you take them off but then everything becomes extremely blurry and you have to squint your eyes to see only slightly better

The principal walks in

Well, it seems the new teacher woke up, listen up, kiddo. If you tell anyone you were a student before, I'll switch you into persona mode, so you won't be aware that you were a student in the first place. And also, go to my office, your new documents and stuff are there, your name is Inoue Takahashi now.