Ouhi-sama wa Rikon shitai: Isekai kara Seijo-sama ga Kita node, Mou Oyakugomen desu wa ne?

Ylis, a saint who has memories of her past life in another world, married King Reinhardt for political reasons, but was leading a loveless life. Then, after finding out that Reinhardt has spent the night with the second saint Hina, she decides to leave him, declaring, "I'm leaving the palace!" What the future holds for the queen who is unsavvy in matters of love, and king who has a hot and cold tsundere personality? Will their misunderstandings ever be resolved?!

(Source: K Manga)