Kono Subarashii Sekai ni Bakuen o!

One year before Aqua and Kazuma's adventures began, Megumin, as the greatest genius of the Crimson Magic clan, dedicates every moment of her life to the pursuit of the world's most powerful offensive magic: Explosion!

Taking advantage of her older sister's absence, probably too busy stealing Yunyun's food, Komekko goes on an excursion into the woods and discovers a mysterious black kitten.

What she is far from imagining is that this little furball actually plays a major role in opening the tomb of an evil god!