Natsu no Arashi!

On a very auspicious summer day, first year middle school student Hajime Yasaka was making a small, prank bomb for his school's "research project," and from its appearance it looked very much like an actual piece of strawberry. However inside the cherry bomb, it was filled with a large variety and amount of hot spices to be exploded once lit. Planning to put in on a strawberry cake and giving it to a classmate whom he did not get along with, Yasaka did not keep an eye on the strawberry bomb and the fuse was lit...

Yasaka Hajime came to the countryside to spend his summer holiday at his grandfather's house. After losing his way, he decided to take a break at a local coffee shop. There upon his arrival, he met Arashi, an older girl who was waitressing there, and was completely taken aback by her. Casually, he took a seat next to another local student, Kamigano Jun, and started talking to him about how wonderful Arashi is. Unbeknownst to Hajime, a figure with a scary face hidden behind sunglasses entered. Calling himself a private investigator, he informed them what he was looking for and then kidnapped Arashi...

Hajime and Arashi are flashed back to a world of the past, and Arashi still cannot believe that she is a ghost. Now, even though weird things are happening at work, all Arashi could do was think about what had recently happened. In the meantime, Hajime advises Jun that there it's strange that a freeloader has all of a sudden appeared and that they should keep a close eye on her, as Arashi becomes increasingly more immersed in her thoughts about earlier...

One day, everyone gathers at Cafe "Hako-bune", where Arashi and Hajime are working, and they discuss about the summer tradition. They end up planning to go to the beach, and Hajime is overjoyed because he will be able to see Arashi in her swim suit. Arashi, Kaya, Yayoi, Kanako are all having fun choosing swimsuits from Master's collection. But Jun, misunderstood as a boy, is having a hard time trying to keep his cover. The following day, they go to the beach in Yamashiro's car. Drawing men's attention, playing with the creatures, each one of them enjoys their summer.

After having fun at the beach, they came to an inn. They enjoyed themselves by going to saunas, outdoor hot springs, and playing mahjong. With Arashi's "kindness," Jun ends up sharing a room with Hajime. To keep her secret, Jun ends up buying men's underwear, and avoiding the bath. But in the end, Jun gets caught by Hajime and gets dragged to the bath. Arashi and Kaya save Jun. With Arashi's proposal, they end up doing a courage test. Arashi and Jun coincidentally pair up. Jun asks Arashi how she feels about Hajime.

Sucked of his life essence on a daily basis by Yayoi and Kanako, Sunglasses is somewhat groggy. Arashi proposes that only one of them use him as a source of energy supply, so Yayoi tries to find someone compatible with her from today's customers at Hakobune. Since Yayoi is shy with men, she struggles to respond back to them. With his dog, Yamashiro arrives at the café. Everyone at Hakobune urges Yayoi to go talk to Yamashiro, but, panicking, Yayoi runs away.