Heichou Wa Onna-sama?! {Shingeki no Kyojin Fanfic}

Everything is going smoothly in Levi's world, until Hanji and Author-san decided to break a little bit of peacefulness in his life just by letting him drink Hanji's latest experiment: The-out-of-the-universe-potion #37.

And of course, no Titan apocalypse is intended by Author-san.