Holy shit, I remember reading this at Danbooru ages ago. Now that I had a look at it, I could immediately recognise Otome Danshi's art. Lina looks exactly like Asuka, only younger, although you have to look at Valtava a bit more to recognise Kei, har har. Yet the reverse didn't work: When I started reading Otome Danshi back then, I didn't recognise the style. I suppose there were enough years between them.