If you are a pirate among pirates among pirates among pirates, then gather your steadfast crew of friends and set sail for our island. Upon finding an advertisement with these words on it for Omatsuri Island, the only recreational resort on the Grand Line, Monkey D. Luffy and his Straw Hat Crew set out for it immediately. Enticed by the island's casinos, spas, beautiful women, and exquisite cuisine, the crew are eager to relax and enjoy themselves. Much to their disappointment though, they are told upon arrival that they will first have to pass Baron Omatsuri's Ordeals of Hell. Once they complete this series of challenges, they will be able to enjoy the resort. However, problems begin to surface the longer they stay on the island. As strange events continue to unfold, the Straw Hat Crew find themselves at odds with one another, disagreeing at every turn. Will the Straw Hat Crew be able to figure out the truth behind Omatsuri Island, or will they fall apart from infighting first?

Nori Kamitsuki has recently moved to the Gunma prefecture from Chiba, following after Otoya Todoroki, a former friend who moved there in elementary school. While on the way there, he receives an ominous text message from Todoroki telling him to turn back and that once someone enters Gunma, they never return. Ignoring the message, As Kamitsuki goes about his school life and makes new friends. These people make it their mission to prove any negative stereotypes surrounding Gunma wrong and show Kamitsuki all the ways Gunma is different from the rest of Japan—from its local foods and landmarks, the changes to its daily school life, and even the attitude of the people who live there. Gunma is widely regarded as the least popular prefecture in Japan, but they clearly don't know Gunma yet!

Unaired episode included with the Blu-ray release. It uses clips of the initial introduction of all three girls respectively but has them in swimsuits instead of their normal attire.

A slice of life of high school girls in the early summer. Shiozaki Haruno is a 17-year-old girl who loves her motor cycle, HONDA's Giorno. She lives in remote highlands and longs for a vivid life in a city. Encounters with people staying at Haruno's parents' boardinghouse encourage her to step forward to her dream.