You go to school.

If Sayori's dead you don't wanna know it at this point. Whatever happened you wanna continue the story, and of course for that you're gonna have to go to school.

You arrive just in time by your rather unkempt locker and take your notebook for homeroom class along with pens, eraser and ruler, and give your notes a review. Flipping through the pages you're not exactly impressed. Nothing useful here about homeroom class, just a bunch of silly drawings and jokes. Seems this character rather suits you.

Once you have grabbed everything you need you close the door and...

What the...? Someone was standing just behind your locker door, evidently just looking through the vent as you got prepared for homeroom. You jump back in shock and drop all your equipment, nearly having a heart attack.
The girl has short, unkempt hair of pitch-black colour with a large pink ribbon bow on the top; observing you with red, discompassionate eyes over her white surgical mask that makes her look like some kind of gangster. She is a short, very petite girl dressed in the same uniform as the other girls yet lacking any voluptousness.

Click!
Click!

The girl is flicking a lighter she is holding in her right hand, generating sparks and the occasional flame which disappears the moment it appears, evidently just to satisfy the girl's fidgettiness.

"Uh, hi there!" you say trying to hide how intimidated you are, "Sorry, you ah... startled me." The girl doesn't respond, just keeps flicking her lighter. "Can I help you with... anything?" Still no response, she just looks at you with intense red eyes, flicking her lighter nervously. You scratch your head in confusion, this doesn't look like a Doki Doki character you're familiar with.

At that moment someone grabs your wrist. It's Sayori!
"There you are Senpai!" She says in a voice as cheerful as her smile. You're so glad she's okay. "Sorry Twenty-Twenty-chan, this is official literature club business. You'll get him back soon enough, I promise!" After saying that Sayori pulls you into one of the club rooms. You can hear the bell signalling the start of the school days.