I did like it. I perceived the romance more along the lines of loneliness. The main guy looks up to his sister because that's all he had. Her love, her care, her respect; everything he learned was from her. In his mind what they had was perfect, wanting it to stay that way. His love for her grew more into iffy territory for reasons mentioned before. Which I guess can happen under the right circumstances but that was impeding her from being happy in another way. I felt the feelings, so it was good.

I love this manga, but I hate it at the same time because of the ending. No, manga, why do this to me T.T. Anyhow, I do recommend for romantic shoujo lovers that love agonising unrequited love and not-so happy endings, yet enjoys the ride anyhow (and especially those that can stand incest).

the low ratings are probably because of the ending that go against normal manga norm. however, i like the story because it is more plausible than the usual trope. nice art and good atmosphere.