The second season of Kekkon Yubiwa Monogatari.

Satou is a high school boy in love with his best friend Hime, an unearthly beauty from another realm. So when she moves back to her home world to get married, Satou doesn’t think twice—he follows her and crashes the wedding. Then, after a kiss from Hime, he suddenly becomes the new groom! But here, Hime is a Ring Princess and her husband is destined to be the Ring King: a hero of immense power. 
 
(Source: Crunchyroll)

When Satou's best friend, Hime, tells him that she's moving, he decides to follow. After crashing her wedding in another world, he ends up as the groom when she suddenly kisses him! Prophecy states that her husband is destined to be the Ring King-a hero of immense power who will save the world from the Abyssal King! Is Satou up for the challenge, or is his new marriage going to end before it even begins?
 
(Source: Yen Press)

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