Tales of Wedding Rings Season 2

Krystal Novaty, also known as Hime, returns to the Nokanatika Kingdom from Japan after a decade-long absence, where she had fled to escape assassination attempts. Her decision to leave Japan led to a promise she made to Haruto Satou, in which he agreed to forget their initial encounter and they would become friends. Haruto, however, unexpectedly remembers Hime and crosses a dimensional portal to reunite with her, but his arrival causes a disruption in the marriage ceremony between Hime and Prince Marmarugias Gisaras. The ceremony is interrupted by an abyss monster, and Hime exchanges rings with Haruto, granting him the power to defeat the monster.