The Horror! The Alien You Prefer

Fed up of being mocked by the rest of his family because he can't see ghosts, Osamu decides he'll impress them by summoning a UFO. However, when his plan actually works and a UFO does appear, he keeps it a secret and starts behaving very oddly indeed. Why is Osamu working late all the time now? Why does he have lots of new female friends and why are the 'men in black' so interested in him?