Prelude of the Crazy Explosion Girl

S1, E5: The village alarm rings, warning of an imminent monster attack. Megumin rushes home, only to find a broken door and no Komekko in sight. Megumin and Yunyun manage to find Komekko in the forest; however, they are surrounded by monsters, completely outnumbered, and unable to use magic spells. To save her sister, Megumin must use her skill points to learn a high-level spell, but she will lose her chance to learn explosion magic.