Love So Life

Shiharu is a high school student who loves kids, lives in an orphanage, and works at a daycare... Until the handsome uncle of two-year-old twins offers her a raise if she'll be their babysitter. Often relying on memories of her mother's actions for guidance, Shiharu quickly finds herself falling in love with her new makeshift family.
[Source: Mangareader]

Not exactly a great shoujo manga, but not too bad either. It's a relatively old manga (2008) so it's going to be a little bit slow in terms of progress.