Its been a while since i read this manga and completely forgotten the name of it. It's about a boy and girl I think they are high schooler who are helping each other to survive an aftermath of a major earthquake that hit Japan. I remember that the manga portray the earthquake very realistic. There were a lot of poverty and gangsters waiting to prey on people. I remember in one scene the girl along with some other women purposely made themselves look very ugly as to avoid getting rape. Please help me find the name of this manga.

Could it be perhaps 51 Ways to Save My Girlfriend / Kanojo wo Mamoru 51 no Houhou ? since it kinds of fit what it happen on it , though that is kind of spoiler-ish

Yes! That's the one. Thank you!