Responses
Yeah, the story is kinda confusing because it have a lot characters and sensei keep jumping from one person/couple story to another person/couple story and also the characters are all connected too, plus the pacing is slow. I also often need to re-read some previous chapters to remember what the heck actually happen now. But that's the mangaka style, slow-paced drama, mature story with real plot and load of characters but jumpy storytelling. It really hit and miss for most people.
I don't really mind the kidnapping thing. Poor Ito but I can understand their action with Hizuru. This poor little puppy is so in love with Youmei he will do anything for him, Youmei know it too and ask Kiriya to stop Hizuru while he taking over Hizuru's job. Why with violence and not in more nicer way? Well, Kiriya and Niwa must do anything to stop Hizuru, and since Hizuru not in condition where he will obey Kiriya or Niwa order, not when Youmei in danger, plus they're yakuza too, so they use violence way. Ito just really unlucky to be in wrong time and wrong place so Niwa used him to hold back Hizuru. He made Ito drunk because it more hard for Hizuru to leave Ito in that condition. I think what Kiriya and Niwa did quite reasonable, especially for yakuza