ok a quick stop before i continue reading....the ''first'' nao-kun??!?!? fuck that bad touch bad touch
ok now i can continue
welp NTR-kun is here, and if the story actually goes 'dark' like that we can assume that he raped the fuck out of satsuki ever since she was adopted, and that's why she doesnt want anything to do with the family, also he probably ordered her to destroy the field in order to severe her relationship with the MC.
now if its goes the less dark way, its the same scenario but instead of rape he mentally abused her
either way, shit is fucked