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Question for a kill la kill, Satsuki side or Ryuko side?
If Mc chooses the satsuki side then he'll become one of her most trusted allies and while he will become an enemy to Ryuko he's actually fighting her either so he can become stronger or so she'll be prepared for what's to come.
Ryuko side MC will only have Ryuko and Mako as friends and allies until later on and there's a possibility he'll probably have something bad happen to him.
Equally there will be a harem of the girls but choosing either side will lead to different actions and such that will happen throughout the story.
If one is chosen I will also do the other side later on either when I'm in the middle of the first one or if I finish it. I hope to hear your thoughts and ideas as to what you choose and why... Nothing silly or such, make it in a somewhat logical way I could possibly use in the story.
Thanks