Hitsugi no Chaika

Hitsugi no Chaika Summary:

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 the girl who carries a coffin on the back named 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?