7 SEEDS 7 SEEDS!7 SEEDS!

"In the immediate future, a giant meteorite has collided with earth. All living organisms, including mankind, have been wiped off the face of the planet. The government, who had foreseen this outcome, took measures to counter the worst-case scenario. In particular was Project "7 SEEDS", in which five sets of seven gifted young men and women were carefully selected and placed into teams (Spring, Summer A, Summer B, Autumn and Winter). Each participant was then put under cryogenic sleep in hopes of preserving the continued existence of mankind.
When those men and women awoke, they found themselves suddenly thrust into a cruel world. While bereft and grieved over forever losing their loved ones, they sought to find ways to survive.

Note: Won the 2007 Shogakukan Manga Award for shoujo manga."


At first I was taken back by the old school manga drawing style but damn, the story line is so rich and each characters are so carefully developed.
It doesn't gather a lot of attention outside Japan but if you do a simple Google Search you will see all those who have had read it, are praising the manga left and right. It's still continuing and the mangaka is planning to end it by this year. Worry not though, there's like 150 chapters right now for you to devour! It's crazy amazing.