Hitsugi no Chaika (Manga)

Hitsugi no Chaika (棺姫のチャイカ) is an ongoing manga based on the original light novel series of the same name by Ichirō Sakaki. This manga is currently illustrated by Shinta Sakayama and published by Kadokawa Shoten in Shonen Ace.

Plot
Toru Acura, an incredibly lazy man with some hidden talents, has been forced by his sister Akari to actually go outside and search for work. However, he is in for a big surprise when he meets Chaika Trabant in the forest, and they are suddenly attacked by a monster! How will they survive? Who is this mysterious girl, and why is she being targeted?