The covers are really different. They reflect both songs. boyfriend reminds me all those animes'openings/endings sung by voice actresses with their cute high-pitched voices, that I pass usually. I don't know if I'll like it or not but at least their voices aren't unpleasant. Let'see when the full song will be out.
I'm a bit disappointed that they didn't break the habit and let the girls having a fierce song :/
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