Kuroka takes Yn to the place where she kill her old master and saved her sister as Yn and kuroka enter the abandoned house looking for information about illegal neko experiments

Yn felt something on his foot as Yn looks down to find a secret door that leads to the basement Yn and kuroka head down to the basement to smell a bad odor it was corpses of dead Nekos

Yn:glad you kill your old master

Kuroka:yeah but I wished I could save my people

Yn gets his camera out and start taking pictures of the dead Nekos and ones that are in some cooling units Yn goes to the desk to see a lot of information about Nekos experiments to make them super devils

Yn:kuroka I found your freedom

Kuroka goes to Yn and see him holding the information as she hugs Yn

Kuroka:thank you Yn I'm finally free

Yn and kuroka get the information and get the Nekos out of the cooling units and teleport back to Kyoto kuroka stayed in Kyoto while Yn teleported to the devil territory as Yn arrived to the place he never wanted to come back to

His ex home

As Yn enters the house all the Maids and butler's see Yn and back away from him Yn kicks sirzechs door down

Sirzechs:Yn your back

Yn:don't get to happy prick I'm only here for kuroka freedom on the accident she was made a rouge devil

Yn gives sirzechs the photos and information of what kuroka ex master was doing

Sirzechs:super devils that's just insane

Yn:now you'll let kuroka not be a rouge devil anymore

Sirzechs:I'll talk to the council about this

Yn:my job is done here

Sirzechs:son wait your mother and i are sorry for neglecting you and hopefully you can return to us and we can Star over be a family again

Yn:no you and your wife neglected me for something I couldn't control your parents didn't help or your sister didn't nor the maids i did everything on my own I spent my birthdays alone when whole family went on vacation all of you forgot me and when millicas was born both of you knew he was the child you both wanted I can't be mad at millicas but I can be sure he know how it feels to be alone when I kill both of you and enjoy every last minute of it

Sirzechs:what have you become

Yn brings out his sacred gear

Yn:balance breaker!!!

Yn appears on his body and ignited his red lightsaber then points it at sirzechs

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Vader:I am what you made me

Sirzechs:I wished I was there for you and you wouldn't be who you are now

Vader:Yn gremory is gone you didn't kill Yn gremory I did...the same way I will destroy you

Sirzechs:then my first son truly dead

Vader:goodbye devil king

Sirzechs:goodbye darth

Yn deactivtes his lightsaber and puts it back on his belt and leaves the gremory mansion then heads back to Kyoto

After Yn left sirzechs told the family what happened as there shock that yn thinks his not Yn anymore only Vader and wants to destroy them

Grafiya sad that Yn gone and now called Vader and wants to destroy her

Rias crying know her first nephew like this because of her

Venelana disappointed in herself as she didn't help Yn only focus on millicas and rias

Zeoctious hurt know his first grandson wants to destroy them

Millicas crying his brother was hurt because of him all millicas wanted is to get to know Yn his brother