After Signing in for Ten Years, I Got the Companion Ghost at the Beginning!

Luo Yuan traveled to a world where ghosts were rampant and became an apprentice at the Ghost Control Academy. Get a sign-in system and randomly sign in at different locations every day to get rewards. Sign in in the classroom and get rewards and companion ghosts! Sign in at the entrance of the academy and receive the reward Marrow Cleansing Pill*1! Time flies, and ten years have passed. On that day, all the ghosts broke out and broke through the seal of the academy's gate in one fell swoop. They were bound to devour the students in the school alive. It wasn't until the ghosts pushed open Luo Yuan's dormitory that they discovered that hundreds of companion ghosts had gathered around Luo Yuan... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.