In the seemingly ordinary halls of high school, Bella and Viraliya, undercover spies known only as B and V, maintain a facade of normalcy while secretly being the world's most formidable agents. Masters of anonymity, they've cracked every case thrown their way without revealing their true identities. But now, a sinister pattern emerges as people mysteriously succumb to fatal headaches and ringing in the ears. Initially dismissed as aneurysms, the alarming frequency hints at a darker conspiracy - a silent mass genocide. { inspired by - toilet bound hanako-kun, omori, attack on titan, death note }