Honkai: Star Rail: I Marry in My Brother's Place, and My Wife Is Diviner Fu Xuan

My younger brother, Lin Xiao, ran away from his wedding, leaving me, Lin Mo, the Great General of Cangcheng, to clean up his mess. My family forced me to take his place and marry Lord Diviner Fu Xuan of the Xianzhou Luofu, who is famous for her strictness. On the day of the wedding, an icy sword pressed against my throat. Jingliu, my childhood sweetheart and former Sword Champion, fixed me with a frosty stare. “You’re marrying her?” I broke out in a cold sweat. One of them was my ex-girlfriend, whom I’d dated online for seven years and who was pregnant when we broke up. The other was my childhood sweetheart, whom I’d sworn at eighteen that I would marry and no one else. And today, in front of both of them, I was supposed to marry one of them on my brother’s behalf. The Xianzhou Alliance allows multiple marriages, but these two... One was a diviner who could calculate the secrets of fate. The other was a Sword Champion who could cleave stars in two. I forced a grin. “Um... How about the three of us live together?” “I’ll take the blame for my brother’s mess, and I admit I was in the wrong too. But, my two dear wives, could you put down your weapons and hear me out first?” Fu Xuan sneered. “Lin Mo, you weren’t nearly so funny when you said you were bored and wanted to break up.” Jingliu’s blade moved an inch closer. “Do the words you spoke a thousand years ago still count?” Me: “...” Help! How did this story about marrying a wife on my brother’s behalf turn into my own romantic battlefield?