Hiroto Shimizu

In the seaside city of Riverfield stands Decelis Academy, home to seven mysterious boys sharing the same secret: They're vampires, hiding their murky pasts. When Sooha, a female student who hates vampires, transfers to the academy, the boys find themselves irresistibly drawn to her. As strange events shake the city, old sins and buried secrets resurface, and their world begins to fracture.

When Kyoichiro comes home, he hears that his 14-year-old son Kyosuke was stabbed to death. The person who killed Kyosuke turns out to be 13-year-old Mitsuru. The two boys were classmates. Due to Japan's juvenile law, Mitsuru will not receive commensurate punishment for his crime. Kyoichiro points his anger at Mitsuru and his mother Hatsumi, but Kyoichiro sees that Hatsumi also suffers from her son's actions.

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?