Come on, this argument can be used for literally any game on this site. This is a hentai, not real life. If the girls in these games behaved like real-life girls, the whole point of these games would be lost. That's why Japanese hentai is so popular, it embraces all kinds of weirdness, completely absurd scenarios and REALLY dumb girls.Well to be fair, you can't call what Marin is doing NTR. She's just a dumbass, not in a relationship with anyone. Yui is also a dumbass with slightly more intelligence. Yui is not exactly NTR either. She's not the mc's girlfriend. They've never even kissed,.or dated, or said that they love each other. The only people being NTR'd are Lucy's husband, Kemo's dad, and mc's dad.