Mesu o Karu Mura Joshikousei Shuudan Ryoujoku Jiken

During a trip of astronomy club students, the bus breaks down, and the group takes refuge in a remote village. It soon becomes clear that strange traditions are observed in the settlement — outsiders are held and forced into marriages, and the students find themselves in mortal danger. To draw attention away and give the girls a chance to escape, their teacher deliberately puts herself at risk; her sacrifice leads to the escape of some students but leaves deep moral and psychological consequences for everyone...