Our Feelings, United! The Guardians’ Battle!

Summer vacation is over and the Guardians return to school. Tadase thinks Yaya needs special training and asks Kukai to help. When a group of third graders come to the Guardians for help finding a lost bird, Kukai suggests leaving the search to Yaya. After begging from both groups, Yaya gives in. Yaya searches all day, but is unable to find the bird.

Synopsis excerpt via Kitsu.