This Human Became The Bizarro Lord

Since childhood, the protagonist could often see terrible "bizarre" creatures that no one else would see throughout lifetimes. Yet, he was never afraid. Instead, he was drawn to those bizarros and grew an attachment to them. Then one day in high school, he happened to meet a bizarro monitor and receive an invite to manage a prison that houses countless bizarros, as well as track down the ones who went lost in the world..