(sorry i only got one size, my computer glitched DX)

Anyway, the anime this is from is Code Geass, and the scene depicted is the ending (SPOILERS IF YOU HAVENT WATCHED DONT READ), meaning Nunnally crying over Lelouch's dead body ;-;
It shows Nana just thinking back on all the good things that happened...
I realize that whenever an anime character dies, its the happy things that happened to them, or the good things that they did that make it so much more sad. I think back on that, and it makes my heart break because i know they'll never feel happiness like that, and they won't be able to make others feel that same happiness again because theyre gone for good. Lelouch had touched the lives of so many...
But its also the happy moments that made YOU happy as well, and its bittersweet. You know they'll never be able to be like that again, but its enough to know that they were able to do that before they died... ;-; dammit im getting emotional.

Sources:
http://actar.files.wordpress.com/2008/10/nightspeed_code_geass_-_lelouch_of_the_rebellion_r2_-_25_h264_1280x720_aac7ca00216final02768800-46-18.jpg

https://0-media-cdn.foolz.us/ffuuka/board/a/image/1351/05/1351058982162.jpg

http://bloggfiler.no/afgpics.blogg.no/images/795617-9-1282325808182.jpg

http://static.zerochan.net/CODE.GEASS%3A.Hangyaku.no.Lelouch.full.418058.jpg

http://images6.fanpop.com/image/photos/33400000/-Euphie-and-Shirley-code-geass-33441569-576-333.jpg

http://imagehost4.online-image-editor.com/oie_upload/images/3222548S741DN/transparent.png

http://pixabay.com/static/uploads/photo/2013/07/18/20/25/old-ship-164981_640.jpg

http://img1.wikia.nocookie.net/__cb20120105093128/codegeass/images/7/72/Code_geass_ep01_the_day_the_demon_was_born_720pblurayx264_-_gg-thora03134304-28-50-geass.jpg

http://images.clipartlogo.com/files/ss/original/100/100090589/claw-scratches-vector.jpg

http://imagehost4.online-image-editor.com/oie_upload/images/323434yufTL/transparent.png

http://animeaura.com/wp-content/uploads/2011/09/cg25-141.jpg

http://www.clker.com/cliparts/2/9/8/1/12918715041901215158Code%20Geass%20Symbol.svg.hi.png

Programs used:
Pixlr editor, Online Image Editor, and Paint