Slice of life story. MC has god-like healing abilities like regeneration, rendering her free from all sorts of injuries even corpse poison. Due to having no attacking capabilities or being "infected" because of her injuries, she's considered dead weight by her parties and always ended up being abandoned by them.
The female lead awoke 2 yrs+ with no memories of her time as a human and kept a diary recording all her experiences from waking up to realizing how normal humans feared her appearance which leads to how she became better at disguising herself. Unlike normal zombies, she still has her consciousness, is able communicate with humans, eat human food (fish, strawberries, etc.), not some crystal in other zombies' neck for evolution as shown in [My Girlfriend is a Zombie] manhua.
Read about 8 chapters, the MC was abandoned in the place where the FL has stayed for about a year, she grew interest and kept following the MC and leaving her food for her to cook their dinner. Their interaction is almost broken when the MC has realized that the FL is a zombie king...
The FL uses writing for communication and later shows the MC her diary when her identity was exposed, successfully gaining the latter's trust to stay with her. The pair decided to stay in some abandoned hut in the forest, the FL planted a man-eating plant in their garden and the MC adopted some wild cat that spits fire for starting their fire.