The two are set in a convenience store, and there develops a sweet romance.
"Backstreet Rookie" is a 16 episode drama with a duration of 1 hour, so here more stories develop. It's not just romance.
Meanwhile "Convenience Store Fling" is a web drama with a short duration, which focuses on romance.
Convenience Store Fling (2021)
Related
Multiple choice MLs dramas for one endearing actress who charms different types of guys.....................
Both are short web dramas about a girl meeting a lot of cute guys who all look like male leads.
Eye candy but not much more to the story ~
I guess as the FL happens to get in a love in this one you would also be able to find not in a love square but I don't know how to put but with four guys and its pretty light and entertaining.