Brain's Base

Mazinkaiser vs the Great general of darkness is a retelling of 1974's Mazinger Z vs. The Great General of Darkness. The new Mazinger Team is overwhelmed by the surprise assault of the subterranean Mykene empire resulting in many casualties, but Mazinkaiser ultimately defeats the forces of evil, ending with a bitter duel against the leader of Mykene, the Great General of Darkness.

Blackouts and other mysteries at NAZKA Academy hint at an impending alien invasion.

Ritsuka Tachibana. She lives a calm and unchanging life. Ritsuka's older brother Lindo returns from studying abroad in the United Kingdom. Shikou Academy student council president Rem Kaginuki calls on the girl, and she begins having mysterious encounters with the student council members. Her life changed a little from that day, but Ritsuka expected nothing more. However, she comes home to find her mother collapsed with suspicious hooded men nearby. They were not human but devils, vampires, and exorcists seeking the Forbidden Grimoire. Ritsuka's former daily life crumbles around her, and she finds herself slowly becoming attracted to Rem, who helps her in her predicament. On the other hand, confusion deepens with regard to her brother who carries a secret. Ritsuka is unsure what path to choose as she finds herself at the center of a love story. (Source: ANN)

OVA adapting the previously skipped "Lightning Bandit & O-Gin" Arc and the "Shimaenaga" (Little Bird) chapter

Amon is a boy who can control the wind. Branik, ruler of the Empire of the Golden Snake, wants Amon's power to complete the ultimate weapon and sends his troops to capture the boy. Amon, using his talents, manages to runs away with Maria, one of the People of the Sea. Together, they try to stop the Empire of the Golden Snake from destroying and conquering everything.

One hot summer day a little girl gets lost in an enchanted forest of the mountain god where spirits reside. A young boy appears before her, but she cannot touch him for fear of making him disappear. And so a wondrous adventure awaits...