Hundred

A teen with alien‑powered weaponry battles monsters aboard a battleship school while a harem of girls watches.

When humanity is besieged by the alien menace known as the Savage, the only hope lies in a mysterious power source called a "Hundred." Those who can sync with a Hundred become living weapons, capable of unleashing devastating energy blasts. Hayato Kisaragi, a high‑schooler who survived a Savage onslaught, discovers he possesses an unprecedented compatibility rating, thrusting him into the elite Little Garden Academy—a floating warship‑school where the nation’s most promising pilots hone their combat skills. At Little Garden, Hayato’s raw talent quickly earns him the attention of a colorful cast of female cadets, each with their own motives and quirks. While he juggles grueling training, uneasy alliances, and the inevitable romantic entanglements of a harem‑styled setting, the Savage grow more aggressive, forcing the students into real‑world missions that test their resolve. Amid explosive battles and occasional fan‑service moments, Hayato must learn to master his Hundred, protect his newfound friends, and uncover the truth behind the alien threat that threatens to rewrite humanity’s future.

A teen military academy battle-harem with frequent sexualized fan service and moderate sci-fi action violence. Expect suggestive situations, multiple romantic rivals, and monster fights — typical of the ecchi genre.