Mirror Game - Volume 2 - Manga

The Pied Piper's Melody

K gains worldwide attention by using YouTube to successfully hypnotize people twice from great distances. Later, his show is broadcast live to 120 countries as he attempts to tele-hypnotize viewers. In this show, K casts a hypnotic spell that will force everyone watching to commit suicide 15 days later, sending the world into a panic. K says goodbye to his audience and disappears.
A few days later...
K appears, without any memory