this story is between either "good" or "bad," but this one is like beyond bad. Like, even that one NTR doujin where the dude tries to blackmail the girl with a picture of her kissing her bf. Even that one doesn't compare to the amount of stupidity in this one. Many of the tropes in this one doesn't even make sense. The sisters get addicted to his "shlong" (which btw looks kinda average if you compare it to the guys who tried to rape mari-nee). And yeah its really stupid if you think about, but what can you expect from a genre that literally involves someone precious to you being taken?