Mesu o Karu Mura Joshikousei Shuudan Ryoujoku Jiken

During a trip by the astronomy club, the bus breaks down and the group is taken in by a remote village. It soon becomes clear that the settlement has strange traditions—outsider women are held captive and forced into marriage, and the students find themselves in mortal danger. To distract attention and give the girls a chance to escape, their teacher deliberately puts herself in danger; her sacrifice leads to the escape of some of the students, but leaves deep moral and psychological consequences for everyone...