I know people are getting at ends with the new boy character, but this just seems to me like the catalyst for Fujishiro to realize she actually wants to go out with Kurokawa. We already know Kurokawa has some twisted feelings for her, but largely it always seemed to me that Fujishiro and Kurokawa are end game. We just need two main things, Fujishiro to realize her romantic intend, and Kurokawa to realize that she is on an equal playing field with Fujishiro. The boy giving Kurokawa any kind of attention will help Fujishiro figure out her feelings for her, and largely can set up either a partial dating scenario with her and Kurokawa or Kurokawa rejecting her in favor of her going out with someone "prettier". Either way, Kurokawa still got self esteem issues.