Battle Royal High School

When a seemingly ordinary high school student finds himself at the epicenter of a cosmic clash, the battle for Earth takes a terrifying turn. Unbeknownst to him, his body becomes the coveted vessel for an alien entity, thrusting him into a brutal struggle for control that blurs the lines between human and monster. As the otherworldly conflict escalates, the collateral damage mounts, threatening to tear apart not only his school but the very fabric of reality. With demonic forces and bionic powers unleashed, this intense action OVA plunges viewers into a relentless fight for survival where the ultimate prize is dominion over a single, unwilling host.

✦ AI-drafted summary