Tonari ni Kanojo no Iru Shiawase: Summer Surprise

Tonari ni Kanojo no Iru Shiawase: Summer Surprise is a Japanese adult visual novel and the third instalment in the Tonari ni Kanojo no Iru Shiawase series. Set during the heat of summertime, the player takes on the role of Gorou Toyama, a student who enjoys spoiling his childhood friend, Koume Uryuu, who acts like a little sister to him. They end up spending more time together than usual over the summer vacation, transforming their relationship from one of friends into one of lovers.

The player can make decisions throughout the game, but these only result in minor changes and do not significantly affect the storyline, which results in a single ending. The Windows version includes sexual content that was omitted from the console versions.