Seasons & Episode
Two nobles, Regis and Seira, arrive at Ye Ran High School as part of their investigation into a series of incidents in Japan. Raizel and Frankenstein conceal their identities when they interact with the duo, but Regis and Seira realize that M-21 is a modified human and grow wary of him. Meanwhile, Tashiro is caught up in another fight with street punks on his way home from school...
M-21 finds himself suddenly blending in easily with normal life. He's even begun to develop some degree of mutual trust with Regis, even though the two of them initially clashed over every little thing. Tao tries to hack into the police department's security system, but Kase intercepts him, and an unexpected hacking war breaks out. Meanwhile, the Union's special forces team, DA-5, finally tracks down M-21's location...
Seira realizes Regis is in danger and rushes to help him. Raizel and Frankenstein suspect that Tashiro and Kase might be in trouble as well, so they follow Seira. M-21 comes up with a plan to sacrifice himself to save all of them, and Regis confronts the danger by his side. The battle against DA-5 has begun! But they're up against the Union's state-of-the-art special forces team, an opponent that won't go down easily...
Frankenstein's battle with Takio and Seira's battle with Hammer grow more intense. Tao and Takio clash as Tao tries to keep Tashiro and Kase out of the conflict, but their leader, Crans, enacts an unbelievably brutal plan in order to win... Meanwhile, Raizel reaches M-21 and uses his overwhelming power to take on Crans.
Tashiro finds himself increasingly attracted to Seira, so he asks the other guys for advice. Unfortunately for him, the likes of M-21, Tao, and Takio are already a hit with the ladies, so their advice isn't very helpful, and Frankenstein only gives him boastful stories from his own history. Will Tashiro's plan to get his feelings across to Seira be successful?
Since contact with Regis and Seira has been lost, Regis's grandfather, Gejutel, heads to Japan on Raskreia's orders. Once he arrives there, he unexpectedly runs into Frankenstein and Raizel. Who were the Frankenstein and Raizel that Gejutel knew in the past? Are their true identities finally about to be revealed?
Rael arrives at Ye Ran High School to collect Seira per the Lord's order, but he encounters M-12, Tao, and Takio there, and a fight breaks out. Who is this man suddenly confronting the three of them? Seira tries to persuade Rael to leave, but Rael continues to do as he pleases. And for the sake of protecting Raizel, Frankenstein can't just stand by and watch all this carry on...
Seira visits Lukedonia per the Lord's order. To protect Gejutel, she has no choice but to conceal the truth about Raizel. Raizel and Frankenstein finally decide to visit Lukedonia in person to settle everything, and M-21, Tao, and Takio follow them in secret. The welcoming of these unexpected visitors would be the start of chaos in Lukedonia...
Seira escapes the Room of Discipline to save Gejutel, but is forced to fight Rozaria, and Regis also heads for the castle to save Gejutel but is stopped by Karias. M-21, Tao, and Takio work together to hold off Rael so that Raizel and Franken can get to the Sanctuary. Fierce battles are breaking out everywhere in response to Raskreia's final decision to force Gejutel into eternal sleep...
Rai wakes up from 820-years long sleep and starts his new life as a student in a high school founded by his loyal servant, Frankenstein. But his peaceful days with other human students are soon interrupted by mysterious attackers known as the "Unions".