Unkai no Meikyuu Zeguy

Miki loses her mysterious bell-shaped object, that her school friend picks up. As they return home by bus, inexplicably the brakes fail, the bus rolls into a long dark tunnel, transporting the two girls into another world. As Miki awakens, she sees wolf-faced warriors abduct her friend — apparently to kidnap the girl with the bell, but taking the wrong girl. Miki tries to follow the strange monste...