Kotoko 
Fake It to Break It! I Faked Amnesia to Break Off My Engagement and Now He’s All Lovey-Dovey?! Volume 2 [EPUB ebook] 

After Viola faked amnesia and Phillip tried to trick her into a romance, they’re finally in a real relationship. Now, in order to become a suitable duchess once they marry, Viola must learn to fight her discomfort of socializing with the other nobles. Phillip also takes up an appointment as a guide for a foreign princess. Viola knows it’s just a job, but she can’t help suspecting her fiancé of infidelity when she sees just how close they’re getting…and Little Vio repeating Phillip’s confession about Luna serves as the final nail in the coffin!

Follow the needy heir and the oblivious heiress as they tangle with yet more misunderstandings in pursuit of their happily ever after!