Do not think it will have something special in the next chapter. After all this is not romance
Thinking about it, it would actually be a hopeful sign if the two of them amiably went on with their routine together now that Keiko knows Ran's feelings. It'd show first of all that she hasn't rejected Ran and indeed is comfortable around her. Then maybe a chapter or two later have her start processing her own feelings in response.
It would certainly have a more organic feel than a quick acceptance or Ran pushing the issue.
I think the same, and I can say that the "love" of the characters is like a love of innocent children, after all they are starting life together ... Maybe one day Keiko and Ran enter puberty hahaha