A series of flashbacks from Dr. Crombel's reminiscence of his earlier times reveal the beginning of human modification in the Union. It was 540 years ago that the Union came across a research journal while excavating ruins. Due to the information within, the Union developed in human modification technology very rapidly. They searched for other similar material but failed to find any. 130 years back, Crombel chanced upon an interesting book in an antique shop. It was a research journal on human modification, more valuable than the one Union had found. Ever since that time, he has kept it for himself, keeping its existence a secret. It's been his trump card to promotion to the senior position. Even this day, he wonders what a genius the owner of the journal was, coming up with such advanced ideas hundreds of years ago. All info he has about the owner, is the letter "F" which was written on both journals. He assumes it must be the initial of the author. If only the guy were in front of him, he would have showered him with praise. As Dr. Crombel enjoys the nostalgic feeling around him, a news is delivered to him ~ the DA-5 has been annihilated. Hearing this, he suspects Frankenstein to be behind the incident. The more he thinks about that blonde guy, the more he is amused. His identity, potential as experiment excites him. Furthermore, he assumes M-21 to be with Frankenstein as well. The loss of DA-5 is a shame but since they were sent to investigate him at the first place, he is eager to see their sender’s disappointment.

At Frankenstein's house, the children are helping themselves with snacks and junks where Tao is introduced as the hacker Ikhan met and Takeo as his cousin. Takeo, who's a beginner in speaking Korean (thought by Tao), tries to genuinely praise Yuna and Suyi but ends up talking crass. Regis stops him and Tao explains him what he has said to cause such an uncomfortable atmosphere. Takeo trembles in regret. Yuna and Suyi comments Seira to be a very lucky woman as she stays in a house full of handsome men. Seira, however, looks at each of the guys and concludes M-21, Tao and Takeo to be too young; Frankenstein as the housekeeping teacher; Rai, too elegant to place anywhere and Regis, a kid to babysit.

Meanwhile, a young woman with a glass-bearing man and two other giant bodyguards have arrived at the spot where DA-5 was wiped out. The woman is none other than Dr. Aris, the creator of the DA-5.

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