Su Shen Xiao Ren
English title: My Little Invisible Being
Japanese title: 宿身小人
Type: ONA
Source: Original
Episodes: 12
Status: Finished Airing
Aired: Oct 5, 2020 to Dec 14, 2020
Duration: 5 min per ep
Rating: PG - Children
Genres: Comedy, Slice of Life

One day in 20XX, the alien pig prince who planned to take a human body as his home arrived on Earth, but unexpectedly discovered that the human being he wanted to live in had not yet been born! The pig prince, who has nowhere to settle down, got to know Saiji and Rubi. The three pulled various funny pranks on humans, causing humans to have baldness, bad breath, headaches, emotional crisis and other problems.

(Source: bilibili, translated)