I've read this manga long time ago. And recall that their is no feeling for them.
One of my friend comment this to me as he know I love to watch drama movie/anime. And even enjoy some action manga with drama fused with them. I read this manga thoroughly and find nothing...and even thought hey! they begin to cry too much
The Story is rather interesting at first. Poor girl who became a weapon...but they try so hard to make us sympathize with the girl and her boyfriend. And try so hard to make us cried. But I found this huh? It barely move my heart and think that oh dear they cried again...and what's repeating "I'm sorry" though you're not from Hinamisawa?
Story-telling is ok. But the plot just keep repeating in the same loop after the hero knew what happen to his dear Chise.And so many time I found that they are overacting , they cried again and I said huh? to myself again.
Drama value in this manga continued to drop repeatedly volume by volume. Even the nearly last episode of Minami-ke : Okawari (Anime) has more drama value than this manga (Yes! I'm talking about Comedic Slice-of-life anime!)
If you want good mecha with romantic/drama value I recommend "Voice of a Distant Star"
Sorry for my poor english...You may tease me "Coppora! Coppora!" if you wish.