Sora no Method

Synopsis

Realising Noel's condition is from straying too far from the saucer, Nonoka calls her father to take them back home to where she can see the saucer. After getting Noel back safely, Nonoka tells the others the truth that Noel is the saucer they summoned seven years ago, which is why she can't leave town. Nonoka later then learns from Noel that she will disappear when she fulfils her assigned wish, in this case, Shione's wish to smile together with Nonoka. The next day, Nonoka learns that Shione is transferring and goes to talk to her once more, learning that she intended to move so that Noel wouldn't have to disappear. As Nonoka becomes conflicted over choosing between Noel and Shione, Shione explains the situation concerning Noel to the others, who argue over who should leave so that Noel can stay. Truly wishing for everyone to smile together, Noel tells Nonoka they will have to part ways.

(Source: Wikipedia)