Aku No Reijo to Juni no Hitomi: Saikyo Jushatachi To Densetsu no Akujo, Jinsei ni Dome No Kareinaru Musoroku

The convicted Duke's daughter, Serina, deeply regretted something at the brink of death—"What I lacked was capable allies." Time then reversed, and in her second life, Serina resolved to round up all those who had abandoned her in her previous life. Learning from her past, she takes in six destitute children and attempts to raise them as her strongest allies (assassins)... but what will happen?!