MC get thrown back into the Fantasia repeated attempt, but this time with a twist, the teachers changed the initial setting and rather than making the world summon a hero they change it a bit to make everyone recognized the MC as if he was always part of this world apparently a relative of Lanuvel. This time the MC decide to go with attempting to clear the scenario by industrializing and building up an army of golem to fix issues together with the Sage another former companion that was comparatively weak hopeless and almost constantly dying from his low health and using the black market using only a partial blueprint of the golem in order to pay for for their service and help. (This part is quite boring in my opinion.)
However as a side story of sort during that time (some parts being alternated with progress of the part already mentioned), the MC end up finding a space in which people from one instance can temporarily use to see people from another, he end up meeting a certain guy whose race was "Ancient Human" that just straight tries to kill him for no apparent reason. And another he meet again the former friend he met during the festival who wants to brag about how he found out how to save and made his, a girl that with ice power that made her go into a self-exile. He tries meeting her again with the MC in his instance of the world, but he act like their history was never reset, as it is made apparent that he cannot grasp that this very version of that girl never met him and is completely grossed out by him. As such the MC cut short the confusion by saving said girl to get over with it, but said girl declared that she would devote herself to the MC which enraged his former friend to attack MC accusing him of having brainwashed her while the MC couldn't care less about her, which resulted in the girl freezing him over solid and the MC asking the girl to get over him and just leave him alone.
After these some minor stuff happened which resulted in the MC fighting an ice monster/spirit and underestimating it by just taking it's attacks that froze the MC solid in a cryo-sleep that lasted about 10 years, during which the black market continued to develop the partial blueprint the MC used to pay for his stuff, hired a warlord to command their armies and started a total against all nations as the warlord with the new golems are uncontested. MC get thawed off by Ice Girl and then meet with Sage who almost finished by himself the super golem made from fusing multiple golems into a suit (yes the MC hired the sage to make golems into a mecha suit). MC then defeat the armies of the warlord and this resulted in the highest level he ever had. After the fight a certain demon came rushing for him, but it's actually the new Demon King daughter who was born between the Demon King and the Elf Queen. She became infactuated with MC and they end up fighting a bit destroying the suit until the Demon King shows up, which took over and wiped the floor with the MC as their level is so high that it resulted in Demon King being almost at full power. But instead of killing the MC, his give an advice a point on how to use darkness and divinity skills, then proceeded to shoot his own heart killing himself and giving the MC the win in the most confusing twist ever.
MC is greeted by the same message as usual with his F grade being in combat prowess since he got beaten hard this time. Resulting in yet another attempt starting.