"Summertime Render" is a Japanese manga by Yasunori Tanaka, a sci-fi suspense story set on a remote island in Wakayama Prefecture. It was serialized in Shonen Jump+ from October 23, 2017 to February 1, 2021.

The story begins when the protagonist, Shinpei Ajiro, hears the news of his childhood friend Ushio Kobune's death and returns to his hometown of Hitogashima for the first time in two years. Sensing something suspicious about Ushio's death, Shinpei hears rumors of a "shadow" that is passed down on the island and becomes involved in a mysterious incident.

The work contains a time leap element, and in the first volume, the protagonist experiences two death returns, and each time the mystery is revealed, allowing you to enjoy the development.

The first volume is the introduction to the story in which the protagonist returns to his hometown and becomes involved in a strange incident, and is a work that combines suspense and sci-fi elements.