Owarimonogatari anime series was released in 2015. In total 9 episodes of Owarimonogatari were aired, and no reported filler material.
A transfer student from an alternate universe named Ougi Oshino has arrived at Naoetsu Private High School. She’s quickly introduced to her new peers by their mutual friend Kanbaru Suruga in hopes that they can help with a strange discovery she recently made: A classroom appearing out nowhere! After taking look around the layout of this place, it turns out there are no classrooms on ground level which means somebody must have built one up high where none had been before…and even stranger still is how nobody seems phased or concerned about what should’ve surely gotten everyone attention—until now!