The game's soundtrack was composed by Maeda, Shinji Orito, Donmaru, Tomohiro Takeshita and Ryō Mizutsuki. Na-Ga, who has worked with Key since Little Busters!, is the chief artist and character designer, and additional character designs are provided by Tsubasu Izumi and Yūnon Nagayama. Nostalgia and the maternal bond are prominent themes in the game. Although AIR also features a rural, seaside setting during the summer, the development team aimed for Summer Pockets to have a different feeling to it. Maeda decided not to write the scenario due to similarities in themes with AIR, which he primarily wrote.

Kai was brought in to direct the project, as well as co-write the scenario with Hasama and Yū Niijima. The novel's concept is by Jun Maeda, who felt that the game needed to make readers cry. Due to its setting and themes, there are some similarities to the aforementioned AIR. (including spin-offs), with Kanon, Air, CLANNAD, Little Busters! and Rewrite among its many predecessors. This is Key/Visual Arts 10th main work (excluding spin-offs) and their 11th visual novel note If you count the two kinetic novels Planetarian and Harmonia. They include Shiroha Naruse, who forgot her summer vacation Ao Sorakado, who is pursuing the legends of the island Kamome Kushima, a high-class girl looking for a pirate ship and Tsumugi Wenders, a younger girl trying to find herself. Once there, he gets to know four girls who are the focus of the story. Hairi grew up in an urban setting, but after an unpleasant incident, he uses the recent death of his grandmother as an excuse to come to the island to take care of her estate sale. The protagonist is Hairi Takahara, a young man not native to the island. Summer Pockets is set on an isolated, rural and peaceful island on the Seto Inland Sea called Torishirojima, which has a population of about 2,000 people.

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