We Agreed to Ascend to the Fairy World, but Why Did We End up in a Mental Hospital?

[Suspense + Fantasy + Epilepsy + Confusion + Decisive Killing + No System] In a cave. "Disciple, do you want to become an immortal?" I glanced at my companion who was suspected of being used as medicine... "Master, I am willing." "Okay, then you will be my apprentice, ranked twenty, with the Taoist name Ziwei!" "Thank you Master for giving me the Taoist title." "Apprentice takes elixir." "Okay Master." "Apprentice, I will teach you how to move Qi." "Okay Master." "Apprentice, you are about to ascend. Your senior brother is waiting for you up there!" "Good teacher... Ah?" His vision went dark, then brightened again. "Welcome to your ascension, little junior brother!" "Wait, senior brother, why are you wearing a psychiatric suit?"