Uh-ha-hah! This is your interpretation of hyperrealism!!! The MC's sister is a hardened bitch who collects nishtyaki that will help her get to the tournament.
The plot would only benefit if the Beggar continued the sex line between Sarah and Christian. The fact that Christian is attracted to Sarah is a great find for the author in this monotonous linear story of Rewamp. Moreover, in the original game, BoN launched a separate storyline between Sarah and her father. It's a pity that this storyline is dead  

In Rewamp, the beggar's everything became black and white, for example, dad became a crazy psycho, Christian a complete jerk and a bastard, etc. In General, the fact that THE entire plot of the game began to be built around the MC and his big dick is a huge drawback of Rewamp in my opinion. What is it? Shorty fucked the whole city 

 At least there was a Beggar in the MNL, from whom the runt tried to learn something.