So... is Summertime Render finished or not?
NO, it is not finished.
Why?
The anime finished after the manga:
Anime finished: September 30, 2022
Manga finished: February 01, 2021
... But MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Synopsis
Shinpei returns to his island home after the tragic death of his childhood friend, Ushio.
Ushio's death is suspicious, and Shinpei soon discovers that something sinister is happening on the island.
He learns about an old folktale of "Shadows" that may be connected to the strange events unfolding.
Shinpei must unravel the mysteries surrounding Ushio's death and protect her sister, Mio, from the darkness that threatens the island.
He confronts a terrifying unknown, determined to fulfill Ushio's last wish.