Ibuki and Kazuichi appear to have a neutral relationship with each other. They are usually able to get along, as they both share a generally carefree and fun-loving attitude. Such as during the prologue where they both seemed optimistic about living on a tropical island. They were also the first two who accepted Usami's suggestion of going swimming. Later in the same scene, Ibuki can be seen playfully chasing Kazuichi along the shoreline.
However, there are also instances where both characters are put-off by each other. Kazuichi is easily startled, and Ibuki's habit of appearing out of nowhere doesn't help with this. And just like many of the other students in their class, he is deeply disturbed by Ibuki's musical performances. Meanwhile, Ibuki shows annoyance with Kazuichi's not-so-subtle attraction to Sonia Nevermind. She even calls him out on this in Chapter 2, when she accuses him of showing up to the diner an hour early just so he could see her.
The ship likely sailed due to the many similarities that both characters have. As mentioned before, they both are known for their laid-back and fun-loving nature. They are also both shown to be somewhat apprehensive, and are usually among the first to panic when a situation seems dire. Both are also shown to have an attraction to women, which is best displayed during a scene in Chapter 2 where both Ibuki and Kazuichi are admiring the girls wearing swimsuits, Chiaki Nanami and Peko Pekoyama in particular. Though the biggest contributor to the ship is likely their aesthetic similarities, as many fans agree that both characters look really good together with their shared "punk-rock" style.
While not the most popular shipping choice for either character, losing to rival ships like Band Aid, Soudam, Sounia and Twobuki in popularity, it still has a significant following, and there is a surprisingly vast amount of fan art dedicated to it. Some fans like to believe that Ibuki would be a good match for Kazuichi if he were to finally get over his crush on Sonia.
- Both Ibuki and Kazuichi have the same eye color, pink.
- They are both shown to have an interest in video games, but aren't particularly good at them.