Kaoru Sakurazuka is a normal Japanese young man, not unique in the least except for his oddly feminine facial features, which he hates. His name doesn't thrill him either -- Kaoru is a common name for both girls and boys. He tries to make up for looking like a girl by becoming extra strong, and no one in the school can beat him in a fight. He enjoys his time living in a cheap apartment with his friends Touya and Renji.

Feeling under the weather, Kaoru made a trip to the school doctor, who's famous for inventing new concoctions in the name of science, and accidentally drinks a vial marked "experimental medicine." Bad move, Kaoru-kun -- the next day, Kaoru is shocked to wake up to find that he's been transformed into a girl! While he desperately tries to find a way to return to normal, he's forced to spend his days in his new female body.

Kaoru is surprised at the changes in his environment now that he's a girl. Everywhere he goes, he's the center of attention, and it seems that everyone is taking an interest in him now, actually thinking him "pretty," although he can't believe it's true. What's more, his new female body is fully functional, allowing him to get some great exploring in. What strange adventures are in store for Kaoru in his new body?

Yin-Yang! X-Change Alternative is an interactive dating-sim game for adults that explores bizarre sex, also known as futanari, and more. Because of the size of the game, Yin-Yang! requires a PC (Windows 2000 , XP, Vista) with DVD-ROM drive to install and play. A great new game from Peach Princess!