The Prince Is in the Villainess' Way!, Volume 4

Iris, the 'Wise Princess Who Never Smiles,' has just remembered her past life as Fiona, Warrior Princess from the neighboring kingdom. In this lifetime, however, the events that lead to Fiona's death have yet to happen, and Iris becomes determined to use the knowledge from her reincarnation to stop the person she suspects is behind her murder: Fiona's cousin, Prince Alvin.