Long ago, humanity built the ELFs to help fight the Honkai, and in time these creations became sentient beings treated almost as equals. After the Ninth Herrscher ravaged the planet, nearly every trace of them was lost to the Sea of Quanta. In one bubble universe, though, things turned out better: ELFs share a peaceful life with humans and study at a special school, ELF Academy, much like ordinary students. Selune's Elegy indulges her chuunibyou side while Blood Embrace plays at being a gangster, in a ten-episode comedy and slice of life ONA.