Awkward sexual tensions that involve random boob touching and being hit afterward. Check
Cousin that is a drawn to be an attractive female, has a noticeable affection for the MC, and is a childhood friend. Check
Plot that involves some sort of end of the world scenario, MC is the only one alive, and must train to become the next Hokage or something. Check.
I'm already tempted to drop this after suffering though the first chapter. Does this pick up at all /a/?
Disregarding that awful OP, MC is a cool guy who's an unapologetic pervert. I don't know where the story's going but I still read it because the girls are hot. Also, his wife is awesome.