My Girlfriend is the Man!

Yun-Jae Park thought his relationship with his girlfriend, Ji-Eun, was perfect--until one shocking morning changed everything. Ji-Eun has mysteriously transformed into a man overnight! Can the two adjust to this sudden and earth-shattering change? And will Ji-Eun ever turn back to who she once was?! (Source: WEBTOONS) *Note: Chapter count includes an epilogue.*