I Also Want to Be a Big Devil in Youyou

An ordinary young man strayed into an impossible world, but turned into a half-demon that everyone wanted to beat up. I wanted to live a peaceful life, but ever since I met Yusuke Urameshi, things started to develop in an unpredictable direction... Human world? If there are any monsters causing trouble, I'll catch each one! Demonic world? In the unified battle between demons and powerful men, I am the great demon king! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.