A couple typos that I noticed:
The second one actually looks like a semicolon, a ;, not an I, i.
My assumption is that the person typing this mistyped the apostrophe, ', that they were supposed to have.
On a side note...yes, combini is a Japanese term. It's also really, excessively strange to put that here, in a South Korean work, as mentioned by radstylix.
And yeah, I've mentioned my issues with Jiwon's character and how it doesn't really look like good writing.