Sadly it's not possible.
So does that mean that mc will get netorare? Cuz his sister will get married to another guy or maybe you should just make that guy a trap character😏
Nope, MC or any of his girls won't get NTR'd. It's true that Natsumi will marry someone else, but Natsumi won't get married to another guy. See the discord server for more explanation about this.
