The official website of the anime adaptation of Key’s visual novel has announced the anime will be released on April 7.

Release date announcement

About Summer Pockets:
Takahara Hairi comes to Torishirojima Island during summer vacation to sort through his late grandmother’s belongings.
As he helps sort through his grandmother’s mementoes, he’s confused by his new experience of island life, but he quickly adapts.
He meets a girl gazing at the sea.
He meets a girl searching for a mysterious butterfly.
He meets a girl searching for memories and a pirate ship.
He meets a girl living in a quiet lighthouse.
He makes new friends on the island──
He finds himself wishing that summer vacation would never end.
[Rewritten from official website]