Dia Horizon - Kimi no Tame ni Oneechan ga Minna Koroshite Ageru
19/09/2023 Update
University student Shinji, who felt trapped in life because he couldn't make progress romantically or with finding a job, was given a chance to reincarnate. Moreover, he was given a "fated partner" to be with. He wondered if a happy life would begin, but then it began -- an eternal death game where he must kill constantly, only ending when he finally is killed himself.