Netorase is sharing am I correct. If the game is called Our Netorase Story why is there a cheating path. Isn't that the opposite.
Just because a game is called 'Our Netorase Story' doesn't mean it just has to include netorase. You can still play the game purely as a netorase one as the title suggests, so I don't get your objection?
Why does it have cheating? Well that's obvious. Anybody who has ever been in a netorase type relationship, knows that the temptation to cheat is ever present. Being encouraged to sleep with other people, often leads to situations where the line between loyalty and betrayal can easily become blurred, if you're not really careful. Because sexual attraction and lust doesn't really make allowances for existing relationships.
It's human nature for people to give in to their desires, even if that eventually leads to unwanted outcomes. People don't always do what they should, but what they want.