My girlfriend is a transcendental demon queen

Kaito Tanaka never expected his quiet, uneventful life to take a turn for the extraordinary—until he met Seraphina, the mysterious new girl at school. At first glance, Seraphina seems like an enigmatic beauty, but Kaito soon discovers she is far more than she appears. Seraphina is, in fact, the Queen of the Abyss, a powerful demon ruler from the Nine Hells who has come to Earth for reasons she refuses to reveal. After an unexpected midnight encounter, Kaito becomes bound to Seraphina through an ancient and irreversible pact. As the two are drawn closer together, Kaito is thrust into a hidden world of supernatural forces, demonic realms, and ancient prophecies—all while trying to survive high school. Torn between the dangers of Seraphina’s dark powers and the growing connection he feels toward her, Kaito must navigate his new life with a demon queen as his girlfriend. But Seraphina’s past is filled with dark secrets, and powerful enemies from other dimensions have taken notice of Kaito. The fate of both their worlds may rest in Kaito’s hands as he learns that love, even with a transcendental demon queen, can be a dangerous game.