I do wonder what was the event that caused these yanderes to like the mc. Or did they all just come out of the womb each trying to claim the mc for themselves?
Yeah I can't help but feel like there must be something more to the whole dynamic. He's never really had a chance to properly fight in the series to the point he can even lose (iirc) and it's a little unclear if he's weak for their nation or just in general.
I was expecting to get any kind of breadcrumb but it seems to just be him going around flanked by his incredibly horny sisters and might as well be sister and protected from any and all dangers which results in them, I guess saving the world. If that's all it is I'll take it as is.
MC feels like just enough of a self insert that you can imagine yourself having two big tiddie deredere sisters and a pettanko deredere loli sister but also not enough of a character to ever assert himself in the plot or as a character in any way.