Sequel to the film Seishun Buta Yarou wa Randoseru Girl no Yume wo Minai. IS THE REAL MINISKIRT SANTA IN A SEA OF FAKES? Sakuta thought he’d already accomplished step one: Find Touko Kirishima. The next step was convincing her to help protect Mai, but that proved easier said than done. In the process, however, he makes a confusing discovery: There are multiple Touko Kirishimas! The Touko he knows may not actually be the person he’s looking for! With clues from his friends’ prophetic dreams, he gets closer to figuring out exactly what danger awaits Mai, but he’ll have to sort through the fake Kirishimas and determine who’s the real deal before it’s too late…

During a rainy day, a woman comes across a strange animal waiting by the side of the road. Pleading to be taken in, the creature offers the woman an umbrella in an attempt to show off its appeal. Intrigued by its clever nature, she brings the dog-like creature home and thus begins their life together.

Despite being adjacent to one another, Chidori Public High School and the all-girls Kikyo Private Academy seem to exist in two different worlds. While the latter boasts an immaculate reputation and favors students from wealthy backgrounds, the former is a nest for dim-witted delinquents. Everyone at Kikyo harbors a deep hatred for their Chidori neighbors. Sixteen-year-old Rintarou Tsumugi is a student at Chidori whose intimidating face leads people to avoid him. Rintarou pays no mind to this, as he is content with his group of friends. However, there is something he has not told them yet: sometimes, he helps out at his family's cake shop. One day at work, Rintarou sees a customer at a table, but she runs off before he can talk to her. The next day, he receives an apology from the girl, Kaoruko Waguri, who explains that she did not run away because of his appearance and that she believes Rintarou is a kind-hearted person. Although he is not used to Kaoruko's bright personality, Rintarou looks forward to forming a friendship with her. There is just one obstacle that stands in his way: Kaoruko is a Kikyo student!

Nico Wakatsuki has finished her six years of witch training and is moving back to town by herself. As a new witch, she must choose a familiar to accompany her. However, unlike the other witches, she wishes to pick a non-animal familiar. There's no better companion than Morihito "Moi" Otogi—her childhood friend who happens to be an ogre. Morihito is vehemently opposed to being her servant, but he reluctantly accepts his fate after learning that a curse would revert him into a strange cow-tiger hybrid were he to disobey a witch's order. Due to Morihito's father leaving for a business trip and Nico's mother remaining behind in the Witches' Holy Land, the two teens find themselves living together under the same roof. While Nico is ecstatic to be living with her crush, Morihito finds that her magical antics and overall clumsiness create more problems than solutions. With a prophesied disaster to befall Nico within the year, Morihito must do everything he can to protect her as her bodyguard while also upholding his duties as her familiar.