Journey to the Underworld

You are a high school student who has just grown up. You usually do nothing but study. Because you are not brave enough, you do not even dare to try the recently popular Pen Fairy game. But after a night that should have been very normal for you, you came to an underworld that you never dared to think about in your dreams. Originally he just wanted to go home, then he wanted to save his innocent classmates, and then he got involved in a dispute from a thousand years ago. Fortunately, in the end, I successfully "graduated" from the underworld without any danger. You swear never to do it again. Purpose: Cows, ghosts, and snakes are all false.