Onnanoko wa Hajimekata

A girl didn't really think much about being a girl, but suddenly, on her 14th birthday, she discovers a strange ability to hear the inner thoughts of boys. Listening to these thoughts makes her much more conscious of her identity as a girl. To make things even more confusing, she hears her childhood friend confessing, 'I like you!' It's a bit of a mysterious and overwhelming journey as she experiences the awakening of her girlhood and the complexities of love all at once.

(Source: Shogakukan, translated)