Personally I'm not a fan of masochist/sadistic characters or SM theme in BL stories.. Only plus point from this volume is that I would have much preferred a longer Haru and Kudou's story..
A piece I really loved tremendously...
And liked how all the characters tie nicely with their pairs.. It was really a journey seeing how each pairs grow in their relationship with the other.. This is definitely worth a re-read.. Gonna do it again one of these days..
Chou to Hana no Kankeisei