29-sai Dokushin Chuuken Boukensha no Nichijou Episode 12

This story is about Shinonome Hajime, an adventurer of Silver Range. He's dedicated to fulfilling missions from the guild. One day when completing a quest for monster meat, he finds a strange girl named Rirui in a dungeon who's far more trouble than she's worth. Saving the girl from certain death, her story reminds him of his similar past and he takes her under his care… (Source: MU)