For thousands of years, Japan has been protected by five clans wielding barrier-weaving magic. Born to a branch family of one such clan, eighteen-year-old Hana has always been stuck in the shadow of her more capable, beautiful, and popular twin sister. When a strong power awakens within Hana, she chooses to hide it so she can continue living a quiet life out of the spotlight. But that ideal lifestyle begins to slip out of reach when Saku Ichinomiya takes over as the new head of the Ichinomiya clan and sets out to find a bride strong enough to stand by his side. Eager to keep her abilities secret, Hana steers clear of Saku... but will she be tempted to sign a marriage contract if it guarantees the peaceful, quiet future of her dreams?

Hana Ichise is from a branch family to one of five barrier-weaving magical clans who protect and support Japan. But in the eyes of her mother and father, she’s an afterthought compared to her talented older twin sister. When Hana’s true potential awakens at age fifteen, she decides to keep her newfound abilities a secret—including from her parents—so she can have a quiet life. But the powerful new head of the elite Ichinomiya clan, Saku Ichinomiya, is looking for a bride...and he has his eyes on Hana!

Hana held up her end of the deal and is ready to follow through with the plan: get married, repair the barrier, get divorced, and cash in on a big payday! However, Saku has caught feelings for Hana, and he deviously changed the terms of their contract. He’s not letting her divorce him that easily, as he’s on a mission to persuade her to reciprocate his feelings. While Hana is trying to dodge his steamy advances, trouble rears its ugly head. Twins from the Nijouin clan turn up and make it incredibly hard for Hana to lay low at school. Things with her own twin, Hazuki, are as tense as ever. And to top it all off, terrorists are wreaking absolute havoc, and Hana may have to reveal her power in order to stop them!

All Hana wanted was a simple life. Instead, she has her hands full sending a terrorist organization packing, saving her school from destruction, and rescuing her twin sister from the clutches of their terrible parents! Plus, she has to stay on her toes to keep her husband’s romantic advances at bay. At this point, living a normal life and flying under the radar are simply impossible. News about who she is has spread far and wide, finally reaching Yukizasa Sankourou, a famous scion from one of the five clans and Saku’s old friend who vehemently opposes Saku’s marriage to Hana. He isn’t content to just grumble either; he fully intends on taking drastic action, and he’s not above teaming up with Hana’s parents to get her out of the picture!

Hana has kept her recently emerged powers a secret from her condescending family. However, the new head of the clan, the beautiful and powerful Saku Ichinomiya, makes Hana into his bride to help strengthen the barrier of a pillar that protects Japan. Now, Hana's powers are being tested by Saku’s family, and she’s even met with harassment at school!

Zagan is feared by the masses as an evil sorcerer. Both socially awkward and foulmouthed, he spends his days studying sorcery while beating down any trespassers within his domain. One day he's invited to a dark auction, and what he finds there is an elven slave girl of peerless beauty, Nephy. Having fallen in love at first sight, Zagan uses up his entire fortune to purchase her, but being a poor conversationalist, he has no idea how to properly interact with her. Thus, the awkward cohabitation of a sorcerer who has no idea how to convey his love and his slave who yearns for her master but has no idea how to appeal to him begins.