Huh, so up to now has only been the first volume, which means we'll have another 15-17 chapters until we get to where the LN was axed.
Still, I can't blame Shiramine being pissed at MC after the trip, saying he's going because of her, yet ditching the group soon after that. Yeah, not even a loner would be that rude. The guy's a dumbass jerk.