Kubikiri Cycle - Aoiro Savant to Zaregoto Tsukai (2016)
Original title: クビキリサイクル 青色サヴァンと戯言遣い
Kubikiri Cycle - Aoiro Savant to Zaregoto Tsukai is a 2016 Japanese-language sci-fi & fantasy series. It stars Yuki Kaji, Aoi Yuuki and Houko Kuwashima.
The story revolves around the protagonist "I" and the murders and mysteries he encounters. He tries in vain to stay out of the story, but instead he always gets dragged into the center of everything. Even though it seems that he contributes a lot, he always finds out that whatever he did was meaningless in the end.