Karin is a witch, but she can't fly on a broomstick! She's also the owner of a magic-shop on Southern Avenue, but recently, another witch named Lise has settled in the nearby forest and is stealing her customers from her! As Karin goes to spy on her new rival, Lise's apprentice, Ruin, appears before her. Little by little, Karin finds herself attracted to him, but as for Ruin-!?