Whoa...man I'm hooked already. I do hope the next chapter comes out soon. This seems like a manga/two-shot/whatever-shot with potential and with the two sisters, it may or may not already have a plus.
It's a series that was finished in the Tsubomi web comic... sort of. The author did not finish by time the web comic closed down, so the last chapter is going to be in the volume 02 tank, which is set to be released some time next year in January. There will be 10 total chapters and there are also five (maybe six depending on the second tank tank) specials which are about four pages each.
Because all character traits are introduced in the very first chapter. Seems legit
Yup! and is too early to talk about incest, I don't think that they're the main relationship, I hope so... The older sister doesn't seem interested at all.
Something else... I got a little scared when she was in the train and the worker saw her, like what if he did saw her wearing that and thinks "Hmmm this girl is into kinky stuff...Maybe I..." Geez! my mind is rotten, isn't?
Hm... not necessarily a real redeeming point (though often put like that in manga), but I assume the father blamed her (quite harshly, from the look of his pose) for the mother's death. Perhaps he also told her "you're just adopted anyway", if those of you who fear (blood related) incest are lucky. ^^