Manticore -Seishin Ikou Jikken Machi-

A modern Japanese city plagued by crime becomes the setting for an unusual experiment involving a college student named Mimi Usazaki. Struggling with depression and undergoing therapy, she becomes entangled in the experiment and finds herself sharing her mind with Hyou Usazaki, her estranged younger brother who is on death row. As a result, she is pulled into a conflict with other death row inmates who also participated in the experiment.