in a sense, this is going to be a bit like a harem anime (because it's not just honami and addie who like itsuki, one more person is going to fall for him. If you don't want to be spoiled, don't even use your brain on this one).

there is another member of astral who isn't there right now, but i won't reveal too much. The anime is based on the light novel (hence the reason why i kind of know what the whole thing is about, and the events that will take place later, for instance, that dragon in the OP).