The Villainess Is a Boy!

He was an ordinary working guy in Japan...but accidentally reincarnated as Asuka, the villainess of a popular otome game "Love Revolution Kingdom." In order to avoid being executed, he must not let the villain prince fall in love with Asuka. However, when Asuka started to act like she(he) didn't care about any of the boys, the characters including the prince became attracted to her. Either love or friendship would lead him to a dead end...but all he wishes is to live his own life!!

(Source: Kadokawa)