To those who said MC is dumb for not realizing the obvious ghost thingies right in front of his eyes, please reconsider your thought. I don't know about y'all but back in my home (Southeast Asian here) we are taught to shut our mouth and blind our eyes whenever supernatural events happen which is exactly what the MC is doing. The further you acknowledge those things, they will get more excited to pester you. Ignorance is better than acknowledgement. And also, some said how can MC did not feel weird about how his days go in which he sometimes realize suddenly the days sped up or what nots. In some cases of extreme supernatural, the victims will live very muddle-headedly as their bodies felt like they were going on auto-pilot. Their mind is foggy and they could barely remember anything. This is based on some of the stories I heard from my fellows and my family members myself. They usually black out and can't remember a thing whenever this kind of things happened. So, yeah, MC is right with his approach in this manhwa. Ignorance is a bliss.