Nyuru Nyuru!! KAKUSEN-kun 2

The anime revolves around little creatures called "Kakusen" who live in the skin pores of humans. Nyuruo is newborn Kakusen who was born in the nose, Nyuruo is ignorant of the world around him, but he is honest. His hobby is stamp rallies and his dream is to become a government worker.

(Source: Anime News Network)