Suddenly, but Only Once

It mainly tells that one time the protagonist Xiaolou accidentally ran out of his house and met an ugly "monster" in an open field. They slowly became each other's companions under the fetters of material things. Xiaolou also suddenly entered a certain space with the help of "monsters". Are those just historical fragments that only happen once? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.