In a slightly different world, girls called ‘witches’ who are born with a rare mysterious ability are required to use their powers to help people. Living in the rural village of Kanahara-mura, Yukito is the son of the great witch Yuris. However, he has no magic ability whatsoever and lives a normal life like any other young boy. He thought his days would continue like this, until three witches-in-training appeared before him. The girls, Arisa, Carol and Topia, came to complete their graduation training “Witches’ Parade” in order to become a full-fledged witch. They ended up freeloading at his house, and he was asked to watch over them. He couldn’t just leave these eccentric girls who are new to the area alone, so he agreed to the request. However, that wasn’t the end of his suffering.
On that first night together, Arisa and Carol both proclaimed that he was their fiancé. He didn’t remember having ever made such a promise, but when he asked Yuris, she told him that he had promised to marry them when they became a witch. He couldn’t back out from a witch’s promise, so he must choose one of them before they complete their training, that is unless he already has a girlfriend. With his senpai Azuki aggressively going after him and his bracon imouto Saya returning from witch’s school, he senses that this will be the most boisterous summer of his life.