Saiko-chan is the yandere stalker at the centre of Saiko no Sutoka, an indie anime horror game by developer Habupain in which players must escape her twisted school. Clips of her sweet-voiced threats became staples of horror Let's Plays on YouTube, where streamers' reactions turned lines like this into shareable moments. The soundboard version strips the line down to its eeriest two seconds, and editors still reach for it because a whispered senpai instantly codes any clip as obsessive, creepy and unmistakably yandere.