Fics like A Royal Wedding

"Do you, Osamu Miya, take Kiyoomi Sakusa to be your lawfully wedded husband, to have and to hold from this day forward, for better, for worse, for richer, for poorer, in sickness and in health, to love and to cherish, till death you do part, according to God's holy law, and this your solemn vow?" Atsumu is so focused on suppressing an eye-roll that he barely remembers to react to his brother's name as his own - no cause for concern though, he catches the unnatural silence before it gets awkward." --- OR: The tender-loving, mushy-gushy, fluffy-wuffy twin-swtich AU no one asked for.

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