Detective Ke Lan: Silver-Haired Revenge

The protagonist's mutation: When Kudo Shinichi was tracking down the black organization's stronghold, he was discovered by Gin and forcibly drank APTX-4869. Due to individual differences and drug improvements, he did not turn into an elementary school student, but the telomeres of his body cells were reversed, turning into the body of a 17-year-old woman (a beautiful girl with silver hair and green eyes, with original memory and reasoning abilities).