WATATEN!: AN ANGEL FLEW DOWN TO ME

Miyako is a shy college student who is also an otaku. One day she happens to meet some angelic grade school kids! When Miyako sees her little sister's new friend Hana-chan, Miyako's heart won't stop racing! Miyako tries to get along with them but struggles... A sketch comedy all about trying to get along with the super cute girl is about to begin! (Source: Crunchyroll) — Description from AniList community (anilist.co).