Fated Guide to the SSS-Rank Sentinel?! But I'm Just A Useless Twin!

[1V1 + Cinderella x Guideverse]Lumi Pei had spent nineteen years being the useless twin.Her sister was one of the Empire's most promising Guides. Meanwhile, Lumi had no Guiding energy.Yet somehow, she became the Fated Guide of Evan Caesar, the Empire's most dangerous SSS-rank Sentinel.A connection she couldn't use.A title she didn't want.And a man she had never even met.When her family demanded that she transfer the bond to her more suitable twin sister, Lumi finally refused.That same night, she fell from the tenth floor of an abandoned building.She should have died.Instead, she landed on the very Sentinel she had been Fated to.He was Rampaging.He was out of control.And after choking her nearly to death, Lumi accidentally did the impossible.She Guided Evan Caesar with just one slap... Or so she thought.Now, the Empire's most dangerous Sentinel is looking for the girl who stopped his Rampage, while her family is beginning to realize they may have chosen the wrong daughter all along.And Lumi?Lumi is about to discover that having no detectable Guiding energy does not mean having no power.Sometimes, the most dangerous abilities are simply the ones nobody knows how to measure.