Alessa's Frills summary:

“The rebel who destroyed everything I had, I’ll definitely make you pay for it!”Alessa, who lost her parents and hometown to the rebels, lived only for revenge.While arresting the rebels’ mastermind, Empress Fleria,she was stabbed.Suddenly, she returns to the day, 10 years ago, when her master, Zekibel, was murdered.This is Ratsin’s will.Change the past, save Zekibel, and kill the rebels!But something’s wrong.Why can I hear Fleria’s voice in my head?“Kyaa! Miss Alessa is so cool! Perfect, elegant, gorgeous!”She’s even my biggest fan?!“Could it be… can you hear my thoughts right now?”Two regressors, each with the other’s inner thoughts in their head.Everything has to do with Fleria.Is this eccentric and bright girl my enemy, or is she part of my fate?!Idol knight Alessa and her biggest fan Fleriachange the past and protect the future. A cheerful secret operation!