I read it on some obscure forum years ago, but basically it ends like this.
Sven and Selene are rescued and both go into rehabilitation.
Sven is given an offer from Selene to do something with his life and work for DSSD.
I remember a panel that showed a welcome back party or something like that but my memory is a bit fuzzy.
Aside from that its the same as the anime really.
The only difference is that the anime is slightly more open ended.