They're just links to YouTube videos that are pretty much Korean ballads (most are about love/heartbreak/etc) and he doesn't really say anything like "thought it was cool, give it a listen". One time he sent me like 6 links to listen to, they're all lovely songs by the way. The latest one he sent me (which was yesterday when I was asking him if we could hang out next week with another friend of his) was from this drama that I know. All I remember seeing is a lot of hugging in that one. I don't think he's the type that would really scrutinize the lyrics however, but then again I don't know everything about him...
Could this pinpoint to anything? Just wanted to get some opinions on this
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