The story: A few males with rare diseases are frozen so cures can be found for them, a virus dessimates the male population, a few males who were frozen are brought back later on to try and repopulate civilization. Now, that's a great premise for all the sex you could possibly want to see but why in the world would you watch anything with a storyline, just go watch a hentai. Instead we actually get a story where, yes, we see the world trying to get the men to reproduce, 2 do and 1 doesnt. The one guy who doesn't is in love with someone who to him only a few days ago he was just with and has decided not to have sex with a bunch of women because he still loves her and wants her found.
The first guy has lots of sex with women, who we see from time to time but he really does nothing for the story because this isn't a hentai and his story is unimportant for the most part.
The 3rd man was in school, he was treated badly, now 5 years later they take all his classmates and put him in school with him. He was bullied while in school and as it's now these womens duty and only chance to have a kid most likely in their entire life they will do what they need to have a kid. This person becomes more sadistic over time as he finds he can do whatever he wants as he's 1 of 5 men alive and we see quite a bit of him because there is a story there.
Now, imagine there are 5 men in the world, what women would do in this situation if they wanted to have kids, what men in this situation would do and throw away the idea of "I just wanted to see naked women" and watch the anime.
If you want a hentai don't watch it.
If you don't want to see nudity don't watch it.
If you're interested or okay with seeing nudity as well as there being a story then watch it. It will be better than say, a monster matsume in regards to actual story.
