I'm always so happy to see more Monster Girl releases...!
'Meteorological Abnormalities'...You mean global warming? Oh no...! Those poor Yuki-onnas...Certainly their plight would motivate more people to care more about global warming, right?
His bodyguard and 'brother' are so kind though. They know the yuki-onna is there, but since our protagonist is happy to help her, they won't interfere. That's kind of...heartwarming actually. It's technically against what they believe in, but they turn a blind eye to it for his sake.
Great ending though! Ah...That's so adorable, she's waiting for him there with his...children? The snowmen next to her, surely they are the children they made together during that one night, yes? He should go to them and they can be a happy family together.
 I wonder if he can have children with female youkai? (Last page we see two snowmen next to the youkai). Also it said in the past the women of his family gave youkai power through intercourse so I wonder if they gave birth to youkai/human children. If so then that means past generations of women gave birth to human and youkai/human children with their human husbands and one night stand youkai partners which means he may have youkai/human relatives.