A year before Kazuma ever reaches Axel, Crimson Demon Clan prodigy Megumin is already obsessed with a single, impractical spell: Explosion. While her rival Yunyun climbs steadily through conventional magic, Megumin refuses every sensible alternative, certain that mastering the one-hit, mana-draining blast will make her a legendary and suitably voluptuous wizard. This manga follows their competitive friendship and Megumin's stubborn path toward her signature magic.