Itoshiki

Olivia Bell Ervine, daughter of a Marquess was poisoned after she was accused of killing the Saint. However, she was summoned by the God Demiur and reincarnated with her memory to three years before the poisoning. In her new life, she finds out that the world she is in is similar to the game she played in her beforelife. Also, she is now aware that she has a special "poison skill"!