Tonari ni Kanojo no Iru Shiawase: I Fight with Summer

Tonari ni Kanojo no Iru Shiawase: I Fight with Summer is a Japanese visual novel and the fifth instalment of the Tonari ni Kanojo no Iru Shiawase series. It is a "what if" scenario of the first game, Two Farce, which shows what would have happened if the protagonist went on a trip to the seaside with Chisa Serizawa instead of staying at school. It is also the first non-adult game in the series, being released without any sexual content.

In typical visual novel fashion, the player periodically makes choices throughout the game which may lead to different endings.