OCD? Most likely it's just a normal habit of disliking something unclean. I said this because I always act like Mochida. The real OCD is the one that Ten Count's Shirotani suffering
you can get a lot of different type so OCD. Obsessive-compulsive disorder can be about germs or other thins, like mine is everything as to be on time or in order. I dont like my food to touch or you to touch me. don't move my stuff. My mom like this one of mine when I have to make make sure that everything is always locked. I go and check the locks 4 time at night so she will know that i lock all the door at night and she dose not have to do it.
Depends on the reason why you can't let people enter your room. If you can't stand them carrying disorganization (germs, clutters), and if you react badly on the disorganization, then you probably have ocd. But as other mental illnesses are, OCD is complex. You can't see it as a simple fear of disorganization. There's the anxiety, and so on.
I don't like people entering my room either, even if it's my parents. But that's because I want to make my room as the only place I feel safe and for other reasons too. I have PTSD.
Cute but....... I really want to puch the seme so badly.