Alternative:
Jishou Akuyaku Reijou na Konyakusha Kansatsu Kiroku.; 自称悪役令嬢な婚約者の観察記録。; An Observation Log of My Fiancée Who Calls Herself a Villainess; Observation Record of a Self-proclaimed Villainess’ Fiance; Fiancée's Observation Log of the Self-proclaimed Villainess; Observation Record of a Self-proclaimed Villainess’ Fiancé; Bertia; An Observation Record of my Fiancée - A Self-Proclaimed Villainess