Villain To The Rescue! -Reborn To Change Her Fiance's Fate!-(2020)

Akuyaku Reijou wa Oshi Miboujin!?: Tensei Shita node Konyakusha no Unmei wo Kaihenshimasu!

Office worker Rena Sato becomes so devastated when her favorite fictional character dies that her friends, who are also fans of the game she plays, give her the nickname "Fake Widow." But, her life changes when she leaves a convenience store one night only to get caught in a traffic accident and become reborn in another world.

(Source: Renta!)