Just based on the first chapter, a very interesting concept! I'm a little wrong-footed by all the comparisons between the android (probable love interest based on yuri tag) and the protagonist's dead sister, but I'm reserving further judgement until there's more chapters. The plot is also a little flimsy, but it's only the first chapter so a little early to judge how later chapters will go. The characters seem interesting, if a little archetypal, but - again - they've only just been introduced. It helps that the art style is quite smooth and polished, with good stylisation, and the artist has good technical skill (anatomy,panel composition). All in all, a manga to keep your eye on!