Tensei Oujo to Tensai Reijou no Mahou Kakumei

Synopsis:

Anne-Sophia, the Princess who recalled her past life quite early on, as well as her old self's extreme love of sorcery, set out to experience her dreams in this dreamland. At some point, during an otherworldly incident, she coincidentally found a scene where her sibling Algard was severing his commitment to his fiancee, Euphilia. What no one might have anticipated is that this odd gathering would wind up redirecting history.