You were called to another world and called Saint. Your role is to help the hero defeat the demon king. This world looked like a game, and you didn't really want to be the savior of another world. When you were sleeping, you were abducted by demons and brought to the castle of their king. When you found out that you were in another castle and there were a lot of demons outside, you just went back to bed to get some more sleep. Since you're an important person, someone will definitely save you.