Getting isekaied could be the best thing that ever happened to MC. If he'd stayed, especially without Nanami around to protect him, his little sisters would have corrupted him to a Bad End by now...
To make it clear to everyone that you're doing it intentionally, of course.
And that's to draw even more attention to them.
Kale: "Ah...you think nudity is your ally? You merely adopted undress. I was born in it, molded by it. I didn't wear clothes until I was already a woman. By then they...
This Mahiro guy is Japanese, so he's a previous summonee. He and Garan probably have history. Maybe they'll even pay off Garan's stereotypical shoujo character design and make them a former couple.
Resurrection spells often have some kind of limitation on when and under what conditions they can be done. Within a certain time frame after death (especially in settings where reincarnation is a thing), the body has to be in a certain condition, etc. One could assume that it's just been too...
They named their son and daughter Kyousuke and Kyouka? I could see maybe doing that if they were twins, but that doesn't seem to be likely since they're pretty clearly in different grades. Their parents aren't exactly very creative...
Naga: "Breed me."
Ana: "What?! Don't be ridiculous! There's no way that will happen! Tell her, Shio-dono!"
Shio: "...Now, bear with me for a minute..."
I love how he gives this gritty, hardboiled, detailed introduction of his dystopian high school and his position in it, dripping with flavor text and world building, and Ana is like "Yeah, whatever, so then you know how to fight?"
If this ever gets an anime, this scene will be amazingly hilarious.
Am I the only one who thinks Empress Onee-san and Molester-tan look a little too similar? Both blond, both lolis even though they're older than the MC. And MC's mom and the one-armed sword dad (who is also blond) do have a previous history, even if there's been no real hint of any romantic...