(Y/N Rose was a huntsman-in-training who sacrificed himself along with his team in order to defeat the immortal witch Salem. Their sacrifices had saved Remnant from its continuous Age of Darkness. However, this wasn't the end of Y/N Rose.)
CHALDEA!
(A young girl named Ritsuka Fujimaru, who is nicknamed as Gudako, is seen holding some weapons which belonged to various heroes, including the Crescent Rose, but she also holds a teigu known as Devil's Extract and the gauntlet which once belonged to the Red Dragon Emperor. Then she chants several words, and summons some servants to help her out. They are EMIYA (Female), Saber Alter, Fairy Knights, and finally Y/N Rose along with his dog Zwei. Gudako's first servant, Mash then speaks up.)
(A/N: She is part of Y/N's Harem too)
Mash: It worked, senpai.
Y/N: Huh? (looks around) Where am I?
Zwei: Woof!
Y/N: (sees Zwei) Zwei! (smiles) Good to see you!
(Y/N hugs Zwei and pets him as the Fairy Knights smile by watching such scene.)
Melusine: Ow....
Baobhan: So cute...
Barghest: I know, right?
Y/N: (shyly) Um... (sees the girls) Hello?
Girls: (wave at Y/N) Hi!
(Y/N then notices a mark close to his neck and a gauntlet in the very hand he holds his Crescent Rose.)
Y/N: Weird, I didn't have this mark before... (sees the gauntlet) and nor this gauntlet.
Gudako: Allow me. (Y/N turns to her) My name is Ritsuka Fujimaru, but you can call me Gudako, or Master.
Y/N: Master?
EMIYA: I see... (to Gudako) So you summoned us.
Salter: It seems so.
????: Gi... GAAAAAAAAAAAAAAA!!!
Mash: Hostiles approaching.
Y/N: I don't know how I got here... (determined) But it's time for some action!
(Y/N readies his Crescent Rose and prepares to fight several skeletons. He then uses his semblance: Petal Burst to dash at the skeletons and slash most of them, much to his own surprise.)
Y/N: I don't remember being this fast... (sees the few remaining skeletons) nor that strong...
(The skeletons charge at Y/N who then punches them with the gauntlet. He keeps attacking until there's no remaining skeleton.)
Y/N: I faced Grimms who were tougher than you.
EMIYA: Well, you have just given me a run for my money.
Mash: Phew. I had my worries, but we made it somehow.
Salter: He seems fine.
(Suddenly Y/N's stomach growls.)
Y/N: Dude, such a quick fight got me hungry. (looks around) Isn't there a grocery store to buy some cookies?
Mash: You... like cookies?
Y/N: Well... yeah... my mom baked them for me before going on a mission.
Gudako: Hmm... (smiles) Well, why not? Let's go!
(That's how Y/N Rose had reincarnated as a servant of Gudako.)