Teiji de Kaette Neko wo Suu

Haruka Asu, 26 years old.

Although she has a good job, she felt unsatisfied with her life. Until she found a stray kitten on her 27th birthday. Haruka couldn't leave the dirty and hurt kitten behind. So she took it to the vet and promised to foster the cat until someone could adopt it…

(Source: ComicWalker, translated)

Note: Chapter count includes a bonus chapter.