Owarimonogatari

What is the end of youth made of?

Recently transferred to Naoetsu Private High School, Ôgi Oshino asks Koyomi for help in uncovering the mystery surrounding the appearance of a mysterious classroom within the school. However, when he finds himself locked inside with Meme’s niece, the teenager discovers that this room holds a memory he had banished to the farthest reaches of his mind…