When you travel between worlds as an observer, be ready for all kinds of unexpected things. Like the fact that in another reality you might end up in the body of a girl who has the gift of driving away dangerous monsters. How can a male “transmigrator” deal with such a twist? Stay unnoticed, as employers advise? Or become a “voice in the head” for the one who day by day seems closer and more precious? The first path is safer. The second is more tempting. But any experiment ends—sooner or later…