National Fate: Marriage Matches Across the Myriad Worlds, Breaking Kafka from Honkai: Star Rail from the Start

[Feel-good power fantasy, crossover, national destiny, marriage-themed rules horror, System, urban fantasy.] A marriage game tied to national destiny, transcending Blue Star, suddenly descends. One man from each country is randomly chosen. The chosen player must pick one of three doors: a Reward Door, a Calamity Door, or a Marriage Door. If they choose the Marriage Door, they must marry a random species from another world inside. Ye Qi was hanging out with his classmates at a music bar when the rules suddenly selected him. Just as he was at a loss, his loophole-finding System activated. The System specializes in finding loopholes. Ye Qi was originally matched with the Mother of Ultra, while the island nation of Japan was matched with Kafka from Honkai: Star Rail. The System kicked in and swapped their matches. [Ding! The System has detected Nami, the Cat Burglar, from the world of One Piece. Would you like to swap?] [Ding! The System has detected Rukia Kuchiki from the world of Bleach. Would you like to swap?] [Ding! The System has detected Hinata Hyuga from Naruto. Would you like to swap?] [Ding! The System has detected the sassy fox Yae Miko from Genshin Impact. Would you like to swap?] “Swap! Obviously I'm swapping. If I don't, am I even a man?” From then on, other countries are continually punished by the game, while the national fortunes of the Rabbit Country keep rising thanks to Ye Qi's “good luck.” Representatives from various countries ask Ye Qi if he has some kind of trick. Ye Qi laughs heartily. “Just lucky, that's all. Pure luck.”