Is My Fiancé a Powerful Outsider?

Having to get engaged as soon as I start college: could anything be more unlucky? ...Actually, yes. My fiancé is pretending to be someone else? ...Wait, my fiancé is actually a powerful being from another race? “We can call off our ‘engagement’ anytime. I’ll also do my best to help you with your studies and daily life,” my “fiancé” said. ...That actually doesn’t sound too bad? With her fiancé’s help, Shen Xinghe went on to overcome every obstacle, pass the entrance assessment, win the treasure-hunting competition, and earn her treasure-hunting license... Fiancé: “So, when are we going to get our marriage certificate?” A story about getting engaged first, then falling in love with a (fake) fiancé.