It's Ren's fandom nickname. They call him that because a) his voice actor also seems to have gained the nickname Jusco (from a survey that was "if so-and-so actor was a store, what would they be"), and b) when he plays the sax in his episode, it sounds like the store BGM.
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It's Ren's fandom nickname. They call him that because a) his voice actor also seems to have gained the nickname Jusco (from a survey that was "if so-and-so actor was a store, what would they be"), and b) when he plays the sax in his episode, it sounds like the store BGM.
yup