29-sai Dokushin Chuuken Boukensha no Nichijou

One day, while dungeon-diving for work, Hajime the adventurer encounters a starving girl named Rirui. The poor girl has been abandoned by her parents and has no relatives she can rely on. Unable to turn a blind eye, Hajime declares, "If you're gonna join my party, then stop crying!" So begins their life together...but as it turns out, Rirui is no ordinary little girl!

(Source: Kodansha)