Okay didn't expect the plot twist so I think this would make a great series. The plot is interesting, but hard to flesh out in a one shot. Good read tho
Uuuuuuuuuuhm I'm not sure if Incest is wincest in this manga. To pretend you own sister is dead to only keep her in a cage like that... but what's to, uueeee I'm not sure...
...errr... hmmm..