Siesta is actually alive; just implanting her heart into her cryogenic preserved body does the trick! Well, considering how Kimihiko had been searching a way to revive Siesta, it doesn't feel a farfetched idea and it was probably bound to happen, but how it happens is a total letdown.

• • How did they remove Chameleon's seed from Kimihiko? It wasn't something that could be removed easily (because he wouldn't have been running around, hurrying to find a way to revive Siesta as he didn't have much time left because of ingesting the seed) but right at the beginning of Volume 5 he is miraculously free from the seed and it is mentioned only once that it was removed. Again, how?

• • Right at the beginning of volume 5, we're introduced to a living, breathing Siesta and we are only later informed that her heart was taken from Nagisa and put right back into Siesta's body which made her alive again. How is it possible? Did the author forget that the AI <Siesta> was using IC chips, artificial spinal cord and other items in Siesta body and a mere heart transplant won't be enough to revive Siesta without removing artificial parts? It seemed to me that Siesta revived simply because author wanted to, common sense and plotholes can go to hell. Or so author's thinking appears to be.

• • Nagisa woke up again because Alicia's heart was found and transplanted into her. I might have already used it too many times but again, how? As far as I remember, Alicia was killed and her body was destroyed but in Volume 5 they miraculously found Alicia's heart which was there for without any reason (because <SEED> wants a living body and not a mere heart to survive so there should be no reason for it to exist after so many years), just conveniently waiting to be found out. Another BS author pulled out for no reason.

• • The main antagonist of this novel <SEED>, an alien lifeform, had no human emotions and only have his survival instinct for which reason he spread his seeds hoping to find a suitable vessel. As a 'parent', he has no feelings for his 'children' and mercilessly kills any of his children who doesn't follow his order or fail to do their task. He fails to pay any heed to repeated attempts of Hel to love her as a parent and instead tries to kill her. And Volume 5 comes in and his goal suddenly changed to a 'parent protecting his children' and gets easily swayed by human emotions (Wow!). Way to go author, you just showed how to forcefully change the mindset of a villain to something that was already discarded without any explanation, simply because it was your whim. Now pray tell me, Author-san, how do I change my thoughts about him from four volumes as a merciless, emotionless murdering alien lifeform who regarded humans as insects and killed many of his 'children' who weren't fit to be his vessel to a protective parent with human emotions without properly explaining his changed mindset from Volume 5?

• • Nagisa had already realized her feelings for Kimihiko in Volume 4 but when she wakes up in Volume 5 she tells him that never liked him. She never said anything about it in earlier volumes. Now she totally behaves as she never had any romantic interest in him (Did she suffer memory loss while in Coma?) The author is hell bent on making readers believe that her relationship with MC never existed.

• • Worst of all, Siesta's character is COMPLETELY different in Volume 5 than from earlier volumes. She doesn't act like someone who had already solved the case before it begins like in earlier volumes but is reduced to a naive detective in volume 5 who just keeps shouting Assistant on and on and has to think about things on the spot and finds herself cornered again and again. She, who was supposed to take lead in these matters, leaves things to her Assistant especially during the <Tuners> conference. I had to re-read Volume 5 twice to ensure that I wasn't accidentally reading about some other new character intoduced whose character didn't match with Siesta. Even the AI made on her behaved more Siesta like than the original.

I honestly want to see Siesta come back to life and the MC to end up with Siesta. Lets see if the MC can do the miracle and save both Siesta and Natsunagi

I'm disappointed about one piece of plot, and that would be the fact, that Siesta won't be back anymore.