I kinda find this brilliant to be honest, its the most unique plot i saw in a Isekai manga.. of course its going to be a harem, but at the same time it makes me wonder about the girl in the real world. And if it has a LN, im going to read it.
Okarun ta mt forte, low diff no mal olhado, low diff no alien humanoide com traje de combate, mid diff no menino guarda chuva com buff de stamina infinita.. brabissimo.