9-nine- Ruler's Crown

The "paranormal science" story follows nine idiosyncratic individuals, linked by the "Choujou Kagaku Kirikiri Basara" occult summary blog run by 17-year-old second-year high school student Yuuta Gamon. Little incongruities that occur around these nine eventually lead to a larger, unimaginable event that may alter what is considered common sense in this world.

When the sky turns red, the moon turns black, and monsters roam the streets, Satsuki Kakeru finds himself involved in a dangerous situation and is transported into a different world. When he meets four others in the same predicament, they band together to survive and to navigate this mysterious new world. But things take a turn for the worse when six shadows appear with the intent of killing Kakeru and his friends.

Ninth season of Oshiri Tantei .

The world has been divided into two halves by a giant wall to prevent the epidemic of "Dark mist". In order to shelter the refugees, artificial cities called "Arks" were built. Shido Enishi is a private detective, who works at the ninth Ark. One day, he is asked to capture a burglar. The seemingly simple case leads him to a great conspiracy.