Welcome to Maebashi City, Gunma Prefecture. For first-year high school student Yuina Akagi, her middling life takes a wild turn the moment a mysterious frog named Keroppe shows up and asks her, “Why don’t you become a witch?” Alongside Azu Niisato, Kyoka Kitahara, Choco Mitsumata, and Mai Kamiizumi, Yuina and her friends are excited to make people’s dreams come true as the Maebashi Witches.

Shoyo Hinata joins Karasuno High's volleyball club to be like his idol, a former Karasuno player known as the 'Little Giant'. But Hinata soon learns that he must team up with his middle school nemesis, Tobio Kageyama. Their clashing styles form a surprising weapon, but can their newfound teamwork defeat their rival Nekoma High in the highly anticipated 'Dumpster Battle', the long awaited ultimate showdown between two opposing underdog teams?