Yoru ni naru to Boku wa

Eight years ago, Mochizuki Saya was raped and murdered by three juvenile delinquents. Shielded by the Juvenile Act, they were allowed to return to society—but Mochizuki Wakaru, Saya's younger brother, has never forgotten their crime and still wishes to see them punished. Not long after the anniversary of his sister's death, Wakaru sets out to track down those responsible, only to be struck by a bicycle ridden by one of the delinquents and hospitalized. While recovering, he awakens the ability to interact with other people's dreams—and soon discovers that these encounters bring about real effects in the waking world. Realizing his newfound power makes a "perfect crime" possible, Wakaru vows to avenge his sister... when night falls.