The Straw Hat crew salvages a treasure chest from a sinking wreck, inside which they find an old lady. To get the pirates to take her home, she promises them the treasure of a golden crown on her island: Mecha Island. Upon arrival, the crew is attacked by the lord of the island but he has a change of heart and decides to seek their help to solve the mystery of the Golden Crown. (Source: ANN, edited)

While on an errand in the forest, retired E-rank adventurer Belgrieve stumbles upon a basket that holds an abandoned baby girl. Taking pity on her, Belgrieve decides to adopt the infant and names her Angeline. Growing up, Angeline idolized her father, especially admiring his swordsmanship and wishing to become an adventurer just like Belgrieve once was. To fulfill this ambition, Angeline sets out to the royal capital. Over the years, she rises to S-rank, gaining the title of the Black-Haired Valkyrie. Despite surpassing her father, Angeline boasts about him and embellishes his exploits, generously calling him the Red Ogre. At last, the time for Angeline to go back home has come, but she quickly realizes that various evil forces persist in preventing her from returning to her beloved father's side.

Fifty years ago, malevolent stones known as Dark Brings brought about the Overdrive, a calamitous event that destroyed one-tenth of the world. In the present day, the nefarious organization Demon Card seeks the Dark Brings' power for their all but innocent intentions. Haru Glory, a sword-wielding silver-haired teenager, inherits the title of Rave Master: the person who wields the power of the legendary Rave Stones, artifacts capable of destroying the Dark Brings. However, the many Rave Stones were scattered across the globe as a result of the Overdrive, allowing Demon Card to continue their malpractices. Groove Adventure Rave follows Haru, his strange dog Plue, the fiery blonde Ellie, and the infamous thief Musica, as they embark on a great journey that will take them around the vast world, searching for the Rave Stones that will finally end Demon Card's injustice.

Kojirou is the kendo instructor for Muroe High School and he's totally broke. But then an unexpected chance is given to him: his team must win against his senpai's team and the prize is: free meals for a whole year! Now, the only problem left... where to find girls skilled enough and willing to join the kendo team?