The stories become progressively darker and more twisted as the manga goes along. The first is the sweetest, most romantic and most poetic I've read of Ogawa Chîse. It was nice to see that she's just as capable of telling that kind of story, as the dark, twisted ones she's better known for. The last story was almost too much for me to handle, despite the fact that I'm used to reading, (and generally 'enjoy'), such levels [and even worse] of sick, twistedness. I was probably just having an emotional day, though. Art on fleek as usual.
After this, read 'Ienai itami o daite iru', which is the backstory for the last couple, and is beautiful and delightfully angsty.
Rakuda Tsukai To Ouji No Yoru