My Isekai Life GN Vol 13
Yuji puts his mining skills to the test when the group he's teamed up with finds a plentiful stock of Mother Earth's Tears. He amazes everyone with his ability to scrounge up far more of the precious resource than ever before, and he is able to make use of the Slimes to carry the incredibly heavy material back to the ship. While en route, however, Proud Wolf begins acting strange. Instead of cowering away from a fight with a Dominus Wolf, Proud Wolf goads him on! What's gotten into the formerly cowardly monster?