Looking for a oneshot manga!?

I’m looking for a manga about siblings who were put in a difficult situation (by the government? mafia? possibly because of a war?) The older brother has a condition that leaves him more and more disabled overtime. I could be making this up but I believe at first he lost a limb and eventually he was put into a... show more I’m looking for a manga about siblings who were put in a difficult situation (by the government? mafia? possibly because of a war?) The older brother has a condition that leaves him more and more disabled overtime. I could be making this up but I believe at first he lost a limb and eventually he was put into a wheelchair and blind. In the end, I believe someone comes to hunt the pair down and the little sister ends up being shot and dies in the brother’s lap but he has no idea. Sorry if the details are fuzzy- it’s been several years since I’ve read it!
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