Not just your daily-dose-yuri. I love how unique their love story is. A new level in which both of them sacrificed themselves just to be with each other eternally. Very convincing and futuristic. But once when one of them felt and asked something, it made them realized that having a physical form and being with each other doesn't mean you can have an eternal love. As long as they know through their hearts what's love and who they love, surely that's what "eternal love" for them.
I just realized rn that this one is really deep because it involves humanity, science, and such. The part where they chose "brains" rather than "heart". I don't know if you guys know what I mean but yeah, really recommended. 5 star for me.
Don't judge the book by its cover.