Alien 9

Alien 9, a three-issue manga series launched in 2005 by Asuka, follows a trio of middle-school girls tasked with capturing extraterrestrial invaders in their school. The series is most associated with creator Hitoshi Tomizawa, whose psychological horror and character-driven storytelling elevate a deceptively simple premise. Its blend of everyday school life and unsettling alien encounters creates a tense, claustrophobic atmosphere that has made it a cult favorite for fans of eerie, introspective sci-fi.