The description is in need of fixing and updating:
Shirosaki Rinko is a high school girl who really loves children. She helps out at the kindergarten that her younger brother attends.
Also on the way home from the kindergarten are Tsuga-kun, a fierce-looking delinquent, and Mogami-kun, a bespectacled cool-guy who gives off an air of disgust.
You might think they're all unrelated, but that isn't the case...maybe? A Raising-esque (?) Youth x Parenting 4koma!!
1. 城崎 as a
name is usually pronounced 'Shirosaki', as toshiNARI has been using. However, there is also a town 城崎 where it is pronounced 'Kinosaki'.
2. お世話しちゃう could be [take care of, support, help, etc.] Given the sibling dynamic, I went with 'raising', as in 'raising children'.
3. The question mark was there in the original blurb, though it serves double duty as me guessing what the best phrase preceding it should be.