Sorry if this chapter short it's all I can think of for the moment

After yn saved his parents from ironwood Yn was contacted by minato and Markarov

Yn arrived at there location as Yn sees minato and markarov

Yn:you contacted me what do both of you need

Minato:markarov and I left union academy and we would like to join you on your planet and along with our family and students

Yn:did you both checked if you bugged or wearing any wire

Markarov:no we checked we're not bugged or wearing any wire

Yn:okay bring your family and friends but the ones that still believe there all powerful and thinks union is superior that will have to stay you can ask them to join but if there still like that then there own there own

Minato:I understand

Markarov:me

Minato:also we wanted to give you this

Minato hands Yn a document

Yn reads the document it was about a little girl who was being tortured by overhaul as her quirk was called rewind she rewind anything or anyone

Markarov:union had this information me and minato and Nezu wanted to save her but the council and headmasters declined the mission so both of us thought you can save her

Yn:overhaul and his crew are all going to die then I'll take the girl to start Mary going to have a sister bring  your families and friends and people you can trust

Time skip

Minato brought his family and friends also the people he trust and the four hokage

Markarov brought fairy tale except laxus and his crew and the other guilds and people Markarov trust

Yn teleports all of them to the stardust planet as Yn showed them to the buildings they will be living in also minato and markarov join Yn council

Union pov

After figuring out minato and markarov left union to join Yn as the headmasters looked for minato and markarov realizing there gone along with there family and friends now they fear Yn more than ever

Yn:after I kill overhaul union and the rest of the villans are finished those who are still power hungry and money,fame,selfish people will be left to defend themselves and once they realize that they will finally learn for what they done and they will either accept what they have now or accept death