"One day, my girlfriend suddenly transformed into a man?!" ... more>>

A romantic comedy about a guy whose girlfriend turned into a boy and the messy antics that follow suit. <<less

Chiaki is handsome, academically gifted, athletic, and born into a wealthy family with a beautiful sister. Despite his seemingly perfect life, he faces a persistent problem: he's never been lucky in love and struggles to capture the attention of girls. Determined to turn things around in high school, he wakes up one morning to a surprising transformation—he has turned into a girl!... more>>

He is shocked to find out that he has lost the appearance he was so proud of, but when he looks in the mirror, he sees a very cute girl in the reflection. He immediately goes to show it off to his twin sister Kaede, who happens to be very popular with the girls, but there is also something very strange happening to her...

(Source: Kadokawa, translated) <<less

Rinko Mino, a first-year high school student, is a female manager of the volleyball club. She fell in love with her senior Yuki in the... more>> same club, worked hard at club activities, and she had a normal and enjoyable life. When she woke up one morning... She was a boy!? What will happen to the youth of Rinko, a girl who suddenly became the opposite sex!!? <<less