Rescuing a young girl engulfed by a slime was just another day for Hajiime, who knew hardships all too well. But when this fiery yet fragile girl, Re-Rui, joins him on his quests, things take a chaotic turn—from battling boar monsters and uncovering her mysterious transformation into an adult form to confronting an eccentric succubus mentor who questions her true potential. Will this budding duo find their rhythm against the odds? Watch their thrilling saga unfold!