First x Marriage

Two people who met for the first time today. Should we have the "world's best wedding" 3 years later…!?
The Nanami High School that Ui enters is a special school where girls and boys spend their dorm life in a shared room, aiming for the world's best wedding! Kon, the guy chosen as Ui's partner by the super accurate matching system, is an ever so slightly malicious guy…!?