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SNS means "social network service", something like Facebook, Instagram etc. :) And I was thinking of asking him that but there is a problem. First, it's forbidden to ask personal questions in the company (not that I care too much about that though, I've already broken most of the rules), but I also don't want to weird him out and lose him as a student if that turns out to be his girlfriend. I will have a class with him either on Monday or Tuesday and I'm banging my head on how to slyly ask him if he's single or not and I haven't thought of something innocent enough yet. XD I feel like such a child lol. Thank you for your replies, I really do appreciate it!