Kill Blue

Juuzou Oogami, a renowned hitman with an unblemished record, faces an unforeseen twist when a mysterious wasp stings him during a high-stakes mission. Upon regaining consciousness, he discovers that he has been transformed into a 13-year-old boy, leaving behind his fearsome reputation and adult prowess.

Now, as a middle school student, Juuzou must navigate the complexities of adolescence while adhering to a new assignment from his boss: infiltrate his classmates and investigate the dangers lurking within their ranks. Amidst vibrant friendships, unexpected challenges, and the threat of rival assassins on his trail, Juuzou's journey raises the stakes of not only survival but also self-discovery. Will he find a way back to his former self, or will he embrace the adventure of this unexpected second chance?