Shitei Bouryoku Shoujo Shiomi-chan

Gen Shiomi, the 56-year-old boss of the Hitotsubashi mob syndicate, must go into hiding to protect his life from potential assassins. He opts to get plastic surgery, only to end up looking like a teenage girl, but he resolves to stay like this until his life is no longer in danger. However, he finds it hard to not be suspicious, but he is saved...