Apocalyptic world as a femboy!

Akira Yanaga, a young 18 year old boy whose features could be described as androgynous, was thrown into a world full of magical beasts, zombies and horny adults as majority of the female populace had died since the apocalypse started.
And to make things worse, everyone is given a system such as the [System of Destruction] or the [Immortal System],
Akira was given the [Femboy System]!
Although, Akira might find himself liking this, even if he denies it!
Akira will start out androgynous and not the most sexy, and his appearance will SLOWLY change over the course of hundreds of chapters. I'm new to writing so a few mistakes will be here and there, sorry!
(Images will be included)