I Swear I Won't Bother You Again! (Manga) Vol. 3

"When Violette went back in time, she vowed that she d live her life differently. Instead of trying to break up her half-sister and the prince, she d make sure that the two of them got together! But now it s starting to dawn on Violette that in this new timeline, Maryjune and Claudia aren't even interested in each other. As Violette tries to figure out a new plan, she remains oblivious to the fact that the prince has fallen for her!"--