Awakened Two Superpowers: But What's with This White Hair and Red Eyes?

In a city where supernatural powers have arrived, a young man awakens two abilities: one weak, one powerful. His weakest ability seems useless, while his strongest forcibly transforms him into a stunning white-haired, red-eyed girl. The more he uses it, the more permanently he loses his male identity. Caught between a self he can never get back and the sister he must protect, he struggles in desperate, burning anguish as his identity falls apart.