When Ymir, an oblivious nerd addicted to on-line gaming, falls asleep in class, she's awoken by Krista Lenz, an upperclassman singlehandedly responsible for turning her into a babbling idiot. She never expected the blonde would begin to notice her, couldn't fathom she'd show an interest in her geeky obsessions, and never would have thought she'd be so darn pervy. High school AU