My Next Life as a Villainess: All Routes Lead to Doom! (Manga) Vol. 3

Katarina Claes, reborn into her favorite dating sim, has finally met and befriended Maria Campbell, the heroine of the game, in the hopes of avoiding exile or death. But when Maria disappears, it's up to Katarina to figure out who's behind it. Could it be the same people who accused her of harassing Maria? Or is there something even more sinister at work? Doom approaches, and the vilification of Katarina is about to begin!