an amazing story about a girl that ate a medicine from her dad which is a scientist, which can turn her into the opposite sex if her heart starts beating, especially when she is with the guy she likes Mitsuru, but on a holiday to the beach the main heroine met a guy that was the son of her dad's rival and that he could transform as well, and later on in the story he realizes that he liked the heroine, so basically after he confessed to the heroine, everytime she sees either Mitsuru or the other guy she transforms into a guy and on the way she meets others that are in the same situation as she is
CUTEXGUY