If this was real life this relationship would be doomed from the start. You don't let go of an inferiority complex that bad that quickly. Even if she's willing to be with Fujishiro her low self esteem would seep into her decisions and thoughts. She'd delegate all decision making to Nanaki thinking her ideas are bad or if Nanaki is upset for whatever reason Kurokawa would blow it out of proportion and think she doesn't want to be with her anymore.
They should just stay friends and we can get our yuri fix from Izumi and Iroha lol.