100-nengo ni Tenseishita Watashi, Zense no Juukishi ni Kyuukonsaremashita: Heika wa Watashi ga Moto Oujo da to Okizukidenai you desu

In her past life, Countess Sheila was Alexia, a queen who lost her life 100 years ago. Now, Sheila has worked her way up to the inner palace while hiding the fact that she is the reincarnation of the queen. But wait, why does King Felix looks just like Claus, a squire and her boyfriend in her past life?! The two of them reveal who they really are, and understand how each other feels... Well, that's what she thought would happen, but when he says "I can protect you as much as possible in this world," is he looking at Sheila, or he is he talking about Alexia? In their past life, the two were bound together by their promise that, "I'll always be by your side." But now they're beginning to grow apart...?! Source: KADOKAWA