Sakuragi's sister's love~~~The male protagonist has not yet been determined.
Either Rukawa Kaede or Sendō Akira.
Either Fujima or Ah Shen.
Either the mistress or A Mu.
Anyway, it's not Danmei, it's not NP, that's the situation.
The heroine is BH, NC, a nymphomaniac, sometimes a virgin, sometimes a sinister person, with intermittent convulsions.