though im not exactly the biggest fan of the weird "onii-chan" step sibling stuff, i'll at least give this props for not being one of those stories.
the kind that are 200 chapters of the main characters dancing around eachother and having like 20 confession attempts, only for the series to end when they finally become a couple. The journey can be fun to see, but a lot of these authors dont understand that the journey as a couple afterwards is just as if not more fun than the lead up.
So for that alone i'll at least give this one a fair shake despite the step sibling stuff.