Taito Ban

A large spaceship appears over Tokyo three years before the story starts. A one-sided war against the seemingly harmless aliens ensues, sparking controversy and pacifism. Despite this unique and tragic event, high school girls Koyama Kadode and Nakagawa Ouran behave as if nothing has changed. They live their days like they always have. The focus of this story is not the alien invasion, but human nature, dialogue, growing up, and life.

In a world where hunters, humans who possess magical abilities, must battle deadly monsters to protect the human race from certain annihilation, a notoriously weak hunter named Sung Jinwoo finds himself in a seemingly endless struggle for survival. One day, after narrowly surviving an overwhelmingly powerful double dungeon that nearly wipes out his entire party, a mysterious program called the System chooses him as its sole player and in turn, gives him the extremely rare ability to level up in strength, possibly beyond any known limits. Jinwoo then sets out on a journey as he fights against all kinds of enemies, both man and monster, to discover the secrets of the dungeons and the true source of his powers.

The OVA, bundled with the special edition version of the seventh manga volume, will tell an "other side" story centered on Mafuyu Satou and Ritsuka Uenoyama that wasn't featured in the Given movie

1990年代の上海の石庫門に住むリモは、シャオユに惹（ひ）かれていた（『上海恋』）。北京で暮らす湖南省出身の青年シャオミンに、祖母が体調を崩したという連絡が来る（『陽だまりの朝食』）。広州に住む人気モデルの姉イリンと専門学校に通う妹ルルは、幼少期に両親が他界し、二人だけで生きてきたが……（『小さなファッションショー』）。