Chun no Ongaeshi(2018)

Chun no Ongaeshi

A sparrow named O-chun crashed into the studio of a struggling young painter. To thank him for healing her injuries, O-chun will cheerfully return the favor any way she can! A relationship between human and bird that transcends biological boundaries in a cute modern fairy tale!

(Source: Comic Action, translated)

Note: Originally published as shorts on the author's Twitter before being picked up for serialization.