In Japan they call that a "Freeter", a person who has no permanent job but moves from part-time job to part-time job. We already know she's part-timing at a convenience store, so she's no NEET (Not in Education, Employment or Training), just a messy girl.
They have their first proper talk, and I think her parents' divorce might be part of how she ended up like this. She was that sweet girl who loved her parents.
A flashback from her childhood. She gave her mom a "cocktail" drink that mixes various drinks she liked. Her mom's reaction to the taste is...