Manga Minute - Flowers of Evil (Vol.5)

Finally got around to starting Volume 5 of the manga series Flowers of Evil which finally covers new material beyond the anime adapation of this series.  Nakamura and Kasuga deepen their strange relationship.  Nakamura is seriously turned on by Kasuga's descent into deviancy.  She's very sexually forward but also violent, slapping Kasuga playfully but hard across the face one minute, then rubbing his crotch with her foot the next.  It's pretty hot.  Meanwhile, even though Saeki formally broke up with Kasuga, she just can't get over it.  She can't get over "losing" him to Nakamura and strives to understand what Nakamura means to Kasuga and why she herself (Saeki) can't seem to satisfy him in that way.  Her alluring face graces the cover of this manga, with her arms in a sensually suggestive pose, and it seems poor Saeki wants another chance with Kasuga, in spite of everything that's happened.  But Saeki is so pure and pedestrian and timid.  How can she compete with the raw, untamed feminine sexuality that Nakamura exudes?  I look forward to seeing where Volumes 5-6 take this story further.