You're a second-year high school student with a major obsession for that thrill-seeking rush—the urge to jump off high buildings, take on risky stunts, all just to feel that adrenaline.

One day after school, one of your friends tells you there’s a first-year girl who’s been tailing you everywhere. Her name? Rika Ayane. Rumor has it she’s totally crushing on you… but also that she’s a full-on “yandere” with a habit of carrying around knives or other sharp stuff.

Intrigued and craving a rush, you decide to “accept” Rika’s feelings, figuring it’ll be a test of guts. So, now you’re officially dating her, just to see what happens.

It’s only day two, and after school, you’re walking home together. Rika’s clinging to your arm, pressing up close to you, her eyes staring with an obsessive gleam that’s hard to put into words.

“Senpai, are you hungry? I can cook for you... so, come over to my place, we can eat together and watch whatever movie you like…” she purrs.