Koko ga Genkai no Oval Gakuen

In the near future, an astonishing truth defines everyday life: all the boys in the world have vanished, leaving behind a society made up entirely of women. What once seemed impossible has settled into the ordinary, yet the strangeness of a world without men colors every corner of existence in this transformed era. Amid this reality stands Oval Academy, a school whose students shoulder responsibilities far beyond ordinary education. These girls have trained themselves into formidable defenders, and the armament they rely on is as unexpected as it is powerful: music. Through melody and sound, they sharpen their abilities and prepare themselves for dangers that conventional strength alone cannot answer. Looming beyond the academy's walls is a threat both enigmatic and immense—an external adversary known as the Abandoned Thoughts. Shrouded in mystery and possessed of overwhelming power, this enemy poses a danger the girls cannot afford to ignore. Rising to meet the challenge, the students of Oval Academy take up their music as a weapon and confront the Abandoned Thoughts head-on, determined to protect the only world they have ever known.