*This prologue will be taking place during the beginning of Lostbelt 1, but don't worry. It will also explain the rest of the Lostbelt Arc Prologue. So with that being said, let the Lostbelt Arc of How I Met My Harem officially begin.*

So.......the world ended again. It was hard to believe entire year after the Incineration of Humanity was prevented, Proper Human History would be wiped out and this time.....Chaldea wasn't there to stop it.

At first, everything was fine....ok. It wasn't fine. The Investigation Team from the Mage Association was questioning every decision that Chaldea had made in the past two years while they were treating Ryan and Gudako like they were possible threats or assets. So, that unfortunately meant that whenever the two Chaldean masters were locked in their rooms. Still, things were ok until the A Team disappeared. The A Team were the best of the best when it came to Chaldean master candidates, but like Gudako, they had been injured during Lev's sabotage and were put in stasis. With Goredolf now in charge of the organization, he finally wanted to take care of the master candidates that were put in stasis starting with the A Team......, but when the staff went to get them, all seven members of the A Team were gone.

That's when things started to fall apart. Suddenly, Chaldea was under attack from a mysterious army, a priest that came along with the Investigation team, Koyanskaya, and a mysterious Caster class servant. The enemy immediately began to kill anyone who got in their way. Luckily, Ryan still had some servants with him. With Chloe, Irisviel, Da Vinci, and Mashu by his side, Ryan was able to hold off the enemy combatants long enough to save Izumi, Gudako, and even Goredolf. However, they were outnumbered, so Da Vinci began take them to her secret project which could help them escape. That's when the worst happened. The priest from the investigation team attacked and fatally wounded Da Vinci, but she told the others to keep going and they did.

When they got to the Da Vinci's workshop, they all climbed into the mysterious vehicle in there where Holmes and the remaining Chaldean staff were waiting. They immediately took off and and as they escaped they could see Chaldea, the place where Ryan called home for the past two years was destroyed. Soon after, Kirschitaria Wodhime, a member of the A Team, announced that he and the other members of his team ,now calling themselves the Crypters, had teamed up something called the Foreign God to destroy Proper Human History. He claimed they did it to bring a better history for mankind to reality, but all Ryan could feel was anger. How could people like him who had pledged to stop the Incineration of Humanity then go on to destroy the world themselves?! They were a bunch of hypocrites and they needed to be stopped.

That's when Da Vinci appeared in her back up form that she had been preparing for emergencies. She had also prepared the mysterious vehicle called the Shadow Border which allowed them to escape from Chaldea. Apparently, Holmes had predicted this would happen when he had been traveling around the Incineration of Humanity incident. So while Ryan was going around finishing off the remaining Demon God Pillars this past year, Da Vinci and Sherlock had been preparing for this. The Shadow Border served as Chaldean new base as they now had to tackled this new type of singularity that had detected in hopes of restoring Proper Human History and by following traces of the army that had attacked Chaldea, they traveled to the closest one located in Russia.

So now, Ryan, Gudako, Izumi, Mashu, and his remaining servants were now in the strange Russian singularity trying to find out how to save Proper Human History. It is here where the group learned about the Yaga, an offshoot of humanity with wolf like appearance, living in a version of Russia where only the strong survive under the rule of an alternate version of Ivan the Terrible. Upon arriving in Russia, the group had been saved by a yaga named Paxti who took them to his home and explained how things were like in this strange singularity. Upon hearing there might be servants in Russia, Holmes and Da Vinci suggested that Ryan and Gudako could make a kite to help trigger a way to summon servants.

So after making the kite, the group made their way out of the village, but not before encountering Koyanskaya again and saving Paxti from being executed by the Tsar's men. Now here they were by a cave close to the weird storm surrounding Russia flying a kite near the storm  to make it possible to summon servants.

"I just want to say......this is bad idea.," Ryan said nervously.

"I have to agree. This is a stupid idea!," Gudako admitted. "We're going to die!"

"Oh stop being a bunch of babies.," Da Vinci said on the intercom. "Benjamin Franklin did this and he was fine! Besides, this is the only way you guys can summon servants again!!"

"Also, Mama is here to heal you guys if anything happens, so you'll be fine.," Chloe said with a smirk.

"She's not wrong.," Irisviel stated with a loving smile on her face. "Don't worry, you'll be in very good hands, Darling."

"Oh no....she's calling Senpai darling again.," Mashu said.

"Is that a bad thing?," Izumi asked.

"Very bad. Last time, Mama tried to make Ryan marry her.," Chloe stated. "If Papa hadn't shown up.....well let's not think about that."

"Ok then. Let's get this started!," the brown haired boy exclaimed has he tried to raise the kite higher.

"Hey! Wait! I don't think I'm prepared for this yet!," the female master yelled.

The others continued to watch the duo bicker when suddenly the kite was struck  a powerful shock of lightning that blasted the pair off their feet.

"Senpai!!!," Mashu cried as she and Izumi raced off to check on Ryan.

"I guess I'll go check on Gudako.," the loli said as she walked towards the crazed master. "Are you dead?"

"R-remind to kick Ryan's butt later.....," the orange haired girl groaned.

That's when the rest of the group noticed both Ryan and Gudako's command spells glowed bright red. In a matter of minutes, several flashes of golden light appeared as every last one of Ryan and Gudako's servants appeared.
At first, they were all confused, but as soon as they saw their masters on the ground, they raced over.

"Are you ok?!," Jeanne D'Arc asked.

"What happened to you?!," Tamamo no Mae exclaimed. "Speak to me, Darling!"

"Ok! Everyone just back off! I'll take care of this!," Jalter said as she pushed everyone to the side before taking her master into her arms. "Are you still breathing?"

"Y-yes...," Ryan mumbled. "Man that hurt."

"I bet.," the Avenger class servant said before punching her lover in the gut. "That's for making me leave you! You should feel lucky that I came back to you at all."

"What the hell dragon bitch?!," Saber Alter yelled. "You could have just killed him."

"Oh come on! We all wanted to do this.," Jeanne Alter said as she felt a sudden kiss on her cheek.

"I missed you too.," the boy managed to croak out before he passed out from the pain.

Jalter blushed a deep shade of red as the other girls growled in jealousy.

"If she gets a kiss, I want one too!," Ishtar exclaimed.

"Me too!," MHX and Ex-Chan yelled in unison.

"I'll just force him to make his wife.," Scathach stated.

"Over my dead body!," Lancer Artoria yelled at the Celtic woman.

"Back off, you home wreckers!!!," Tamamo yelled.

Meanwhile, Ryan's male servants just watched as the girls argued amongst each other.

"Nice to see nothing has changed.," Emiya said.

"Should we help get Master to safety?," Siegfried asked.

"Nah...," Li Shuwen stated. "We learned a long time again not to interfere when it gets this bad. Just sit back and enjoy the show."

The girls continued to fight when Ryan woke out see a familiar genius. "Da Vinci?"

"Hi there Master.," the original Da Vinci said with a smile on her face. "Nice to see you again."

"Hold on! Is that me?!," the other Da Vinci exclaimed on the intercom.

"Yep. While I may have died back in Chaldea, I now act a separate entity from counterpart on the Shadowborder.," the great Da Vinci-Chan stated. "So now, get two of Da Vinci's for the price of one."

Tears began to run down Ryan's face as he hugged the Caster servant. "I'm so glad you're back!"

The brown haired woman smiled as she hugged her master back....until she realized that now all the other girls' eyes were on her. "Oh crap baskets...."

"Oh you say that too now.," her younger counterpart said.

"Get her!!!," BB yelled as the girls charged at the pair.

That's when Paxti came out of the cave. "So are you guys done yet because I've be—why are there suddenly so many of you guys?!"

Ryan just smiled at the yaga. "Well.... that's a long story..."