Juzo Ogami has never led a normal life. He was picked up by a criminal organization as a child and grew up to become a legendary hit man. But everything changes when he's bitten by a mysterious insect and becomes a teenager again! Can this battle-hardened assassin handle the rigors of middle school life?!

The home ec club divides into teams for a ramen cook-off. Will Shin or Noren, who are both ramen fanatics, pull off a win? And to spice up the competition, a new "unicorn" suddenly shows up, but who is she?