I Can't Have a Harem When I'm Trapped in Weirdness

Suspense + weirdness + a little horror + no system + no rebirth + no supernatural powers + a relaxing suspense light novel A sophomore student suffered from inexplicable headaches and often had nightmares. He woke up early one morning and found that his roommate had committed suicide by jumping off the building. However, a few nights later, the dead roommate reappeared in the dormitory. As the investigation unfolded, there were ghosts in the hotel room, jealous silicone dolls, strange women on the road at night... There were more and more bizarre things, and the protagonist, in addition to being frightened, had to juggle between female doctors, policewomen, and school beauties, but he did not know that the danger was getting closer...