(You're playing as Yuta/Yuuta Togashi here)

After middle school you went to a school far away from your old one because of some embarrassing stuff you did then (chunibyo stuff)

Before class starts Rikka come to you, pointing

"We've finally met, Dark Flame Master!"

You got surprised in why she knew that, before you could say anything, she grabs her eye saying it's 'reacting', and the teacher sent you to the nurses office but the nurse wasn't there so you had to get the eyedrops yourself