OVA bundled with 4th volume of manga.

Rinne Rokudou has bigger problems than going to school—namely, helping spirits pass over to the next life. Because of this responsibility, he often finds himself short on money and struggles to buy his necessities: food, clothes, and exorcism tools. Sakura Mamiya has been able to see ghosts since she was little. She hoped she would outgrow it, but even after starting high school, nothing has changed. To make matters worse, the first time her ever-absent classmate, Rinne, shows up for school, only Sakura can see him. She assumes, as anyone would, that he is a ghost. However, to Sakura's surprise, Rinne proceeds to attend school like normal the next day. Kyoukai no Rinne chronicles Sakura's journey as she learns of Rinne's true nature and the existence of a hidden supernatural world. [Written by MAL Rewrite]

Kyouhei, after moving away to Tokyo from his old town to get away from the events that happened, is on a goukon with his friends, including his old neighbor, Shiba. After drinking for a whole night, he and Shiba discover a dead, bloody body in the elevator. He is told by his younger sister, Utao with her Kamisama Doll, that Aki, an old friend, and his Doll are the culprits responsible.

One year after the events of Beyblade Burst Rise, brothers Hikaru, and Hyuga witness the power of superking/sparking evolutions of Valtryek, Roktavor, and Satomb. The three beys radiate a power that was not even dreamable, due to their bladers pulling off a sparking launch. Hyuga and Hikaru get inspired to make their own sparking beys, Hyperion and Helios, and compete with the legendary bladers, training to best the top ranked bladers to ever touch the stadium. Prepared to do whatever it takes to become the best, they head across the globe to challenge the best to ever let it rip, in an effort to become stronger, and battle all of the top bladers that were able to make their mark in the stadium. (Source: Wikipedia)