I Sought You, Found You Not, and Returned Empty-Handed

Xing Ji and Xuan Xiao grew up together in an orphanage and became the best of brothers. The day before they were supposed to visit the orphanage director together, Xuan Xiao suddenly vanished! Their friends, family, coworkers, and even the director don’t remember anyone by that name. To be precise, he hasn’t gone missing: he has disappeared from the world entirely! Don’t worry, brother. Even if the whole world forgets you, I won’t. I’ll find you, no matter what!