|Release Date||March 25, 2010|
|Volume||Light Novel Volume 3|
Summer festival is chapter 36 of the Boku wa Tomodachi ga Sukunai Light Novel series. It is chapter thirteen of volume three.
At the clubroom, Yozora casually informed her club-mates about a summer festival being held in the city's shopping district by the shrine. With nothing to add Sena remarked that she thought of going to that festival together as Yozora and Rika neglected; both being uncomfortable with crowds. After conversing with Rika, Sena coyly asked Kodaka if ever there will be any takoyaki stands by the festival, claiming she is fond of them. Affirming Sena's question, Kodaka stated his love for takoyaki as both Kobato and Maria also wanted to eat takoyaki and Kodaka concluded by saying they're going to the festival as a group of five (with Yukimura) until both Yozora and Rika also decided to join for the takoyaki.
The next day, arriving at their meet up place, Kodaka complimented Rika (who was wearing a yukata and with her hair freely hanging on her back) on her looks, causing the latter to blush. While waiting for Sena, Yozora declared that they're leaving without her until Sena showed up, annoyed by Yozora's declaration. While Kodaka was captivated by Sena's appearance (wearing a yukata), Yozora slapped Kodaka on the back and quickly walked away as the rest followed her.
Seeing Kobato not in a yukata, Sena, Kodaka, and Kobato went to rent a yukata by a store (under Sena's command). After donning on their yukatas; as Sena ogled over Kobato, Sena criticized on Kodaka's appearance, mainly pointing out his dirty-blond hair. As Kodaka explained to Sena the reason why he couldn't dye his hair; due to it being the only link between him and his deceased mother, Sena remarked to Kodaka that he is different from all the other males.
Arriving at the shrine, Kodaka instantly found Maria eating numerous snacks as the rest also continued to dine on their food. After eating, Yozora and Rika intended to go home as they'd already finished for what they'd came for (takoyaki). Flurried, Sena challenged Yozora in competing with her at some games by the festival. While insulting Sena, Yozora agreed.
As Sena and Yozora compete, the rest strolled and frolicked around the festival. After winning several prices, Sena and Yozora called off their competition. After returning the yukatas, the Neighbor's Club decided to light some fireworks as they wait for Stella, the steward of the Kashiwazaki household, to come and pick them up. With most of their fireworks used, Yozora lit the final remaining firework: Last Boss, which resulted with the ends of her hair getting burned and Kodaka threw in a bucket of firework-contaminated water all over Yozora's hair by reflex, killing the flames. Seemingly agitated on the state she was in, Yozora left the rest of the Neighbor's Club at the park.