S1.E5 ∙ Berliner Mystery

When the most prestigious university of magic loses Orphen, their most talented student, they'll do anything to get him back.

In the distant future, the earth is almost entirely covered by the ocean, with only small islands and floating cities on the surface. 15-year-old Maia Mizuki is turned down by the prestigious Ocean Agency, despite her exceptional skills and superior grades. After finally being evicted from her home, she joins the Nereids squad, a group of bounty hunters who seek fugitives from justice and other dangerous missions.

A new splinter race of the Zentraedi show up: the Marduk. While the Zentraedi were defeated by Lynn Minmay's music, the Marduk have their own singers (emulators), spur their soldiers into battle. A reporter name Hibiki Kanzaki captures a Marduk emulator, Ishtar, while reporting on a battle, and proceeds to teach her of the happy-happy fun-fun nature of peace & love, which she shares with the rest of her people.

A terrible war has ravaged the land, and now, fueled by the blood of numerous fallen warriors, the Yoma, demons from hell, emerge once more. A skilled ninja seeks to end the bloodshed these demons inflict upon humanity, but to do this he must fight against his undead former best friend and fellow ninja who was killed in battle and has been resurrected to serve the Yoma.

After finding out he is the son of the great leader of Ohu, Gin, Weed sets out on a journey to find his father. However, with many friends to find, there are many enemies.

The new protagonist, Win Kirifuda, who lives in the quaint seaside town of Shirahama, who's a 12 years old who loves Duema. One day, he was chosen by Jashin to be the vessel of the Darkness Civilization cards, the Abyss Royales leading into the Abyss of DUEMA. This leads to the D4, the strongest four-member team that dominates the world of Duema, and its leader, Prince Kaiser, involving themselves with Win and Jashin-kun. How will the story go as we follow the start of Win's journey into the world of Duel Masters with his new partner Jashin-kun.