Stalker Reijo no Hazu ga, Nazeka Dekiai sarete Imasu

The story follows a protagonist who is reincarnated as a villainess in a fantasy world. She is meant to play the role of a stalker (a Sutooka Reijo or "stalker noble lady") who obsessively follows the male lead. However, her actions are interpreted differently, leading to her being unexpectedly adored and loved by those around her, disrupting the original plot.

(Source: Piccoma, translated)