tbh i dont think they should forgive the father, he left both of them alone and started a new life without them. I dont like how Pure wants them to make up, Especially Ruri he should move on but he can choose whether he forgives his father or not. I hate how the father wants his new daughter to be seen as a younger sibling to them, they most likely want nothing to do with his new family.
bless neoon for letting them borrow her studio