Kuro Kiryu/Nazuna Nito

**Kuro Kiryu/Nazuna Nito** is the relationship between Kuro Kiryuu from AKATSUKI and Nazuna Nito from Ra\*bits.

Kuro and Nazuna first meet during the events of Reminiscence \* Marionette, where he stumbles upon Nazuna practicing his singing at the rooftop. Kuro initially gets peeved that someone is in his territory without permission, but upon listening intently to Nazuna's voice, he comments that he finds it attractive. (It's like Kuro finds a lot of people attractive?) He disturbs and scares Nazuna, but Kuro apologizes and they slowly warm up to each other.
They meet again during their second year in Folk Song, where Kuro runs into Nazuna eating lunch. Despite Nazuna’s inability to speak, they are able to spend time together, with Kuro capable of understanding what Nazuna is trying to convey through body language and facial expressions. Kuro is happy to have Nazuna accompany him during break, and encourages him to come to the rooftop to bond whenever he is able.
Moving onto their third year in Yumenosaki, they are classmates under the section of 3-B. They share the same class as three of the oddballs—Rei, Wataru, Kanata—as well as Leo. Because of this, they often comment that their class is usually empty save for the two of them and they tend to stick together because no one else is really around. They spend a considerable amount of time together, like how Kuro takes Nazuna to the cutesy shop in Kuro’s card story “Wild Boar” or Nazuna helping Kuro with his studies in one of Nazuna’s substories. People would point out about how close they are, like Keito during Summer Night Festival and Shu during Human Comedy.
They share a very tight-knit friendship, which is often showcased by the great deal of care and protectiveness they have for each other, even without the other's presence. In Happy Spring, Kuro talks to Anzu about how impressed he is to see that Nazuna is growing well as Ra\*bits leader, while speaking up about his worries that he’s overworking himself to the bone. He asks her to look out for him so that he wouldn’t push himself too far. In Shinsengumi, when Madara brings up Nazuna and his growth with a bit of a teasing tone, Kuro immediately gets defensive for Nazuna and speaks up that he would show off his worst side of him if he ever tried anything to hurt Nazuna. Likewise, in Human Comedy, Nazuna jumps in to defend Kuro when Shu began to criticize his behavior, saying that he won't allow anyone to sully Kuro's name knowing how much he already brings himself down. In Wolf and Red Riding Hood, when Kuro worries that kids wouldn't like him because of his scary face, Nazuna constantly assures him that kids will surely like him for who he is despite it.
They uplift each other up and feel assured when they’re together. In The King’s Horseback Ride, they join Leo and Eichi to form Knight Killers to fight against the other four members of Knights. When being called to take the stage by Leo, Kuro says he feels like he can handle things easier when he’s by Nazuna’s side, compared to being with Leo or Eichi. They also help each other out, like when Nazuna asks Kuro to help teach him how to sew for the puppet show in Wolf and Red Riding Hood.
Kuro says in Human Comedy that he sees Nazuna as a precious friend, someone he spent a lot of his time during classes studying together and chatting and laughing with—which is why he wants Nazuna to be able to take a step forward without leaving any grievances behind.
After graduation, with Kuro moving on to work with AKATSUKI in Ensemble Square while Nazuna studies in university, their friendship remains as strong as ever.
In Nazuna's Idol Story "Why Not Try It On?", Kuro bumps into Nazuna who was startled by a saleslady who approached him and asked if he wanted to try on the dress he was looking at. Kuro saves Nazuna from the predicament and finds themselves chatting afterwards. When asked how he finds university, Nazuna says he’s happy and doesn’t regret going to university at all. Kuro replies that he’s happy to see Nazuna living life the way he wants now.
After the events of High Five and in Nazuna’s Idol Story 3, Kuro runs into Nazuna singing by himself in the Hanging Gardens. Kuro comments throughout their talk how much Nazuna has changed, and Nazuna opens up to Kuro about one of his reasons to come back—as well as how much he loves and is happy to be an idol. Kuro vows from there that he will be there for Nazuna—to protect him if anyone tries to mess with him and reach out his hand to him if he ever stumbles—that from now on, they’ll walk forward and become idols together. Nazuna is happy to return and Kuro welcomes him back, speaking out that since back in their past in Yumenosaki, he sees Nazuna as the first true idol he’s become a fan of.
Nazuna is brought up by Kuro in Unification by Force, named as one of the few people he didn’t want—along with Leo, Tetora, Shu, Keito, and Souma—to worry about him and be seen as someone strong to power through every problem.
-From Enstars Wiki.