Voice Among Heroines {Superheroine Harem}

In a world where superpowers are commonplace, one strange rule has persisted, every superhero has been a woman. Though there are male and female supervillains, female Superheroes seem to be the only heroes present.
Until now.
One young man unexpectedly becomes the world's first male hero, immediately making him an anomaly in the superhuman community. Stranger still, his unusual power unveils more to him that he never knew.
Before long, he finds himself acting as both hero and coach, working alongside superheroines ranging from inexperienced newcomers to world-famous champions like Zenithwoman.