Kiiruma

M1-B0 is a het ship between K1-B0 and Miu Iruma in the Danganronpa series.

Canon
With Miu being quite disliked in the group, K1-B0 appears to be the only student, other than Kaede and Gonta, who genuinely likes her and wishes to be friends with her. Because he is a robot, Miu took a special interest in K1-B0 and even appears to feel sexual attraction towards him, though it's unclear if he is aware of this. As her talent would indicate as such, she would often perform maintenance on him, in a rather suggestive manner they both seem to find very pleasurable. Her intense personality makes K1-B0 feel very shy and he blushes a lot due to Miu's compliments and remarks, and Miu in turn thinks he is cute. Being very interested with K1-B0's talent and features, Miu went inside his talent research room without his permission. Besides that, she added many new features to K1-B0, such as flashlight that came out from his eyes. She also wishes to give him a vibration function, but he declined. While Miu is very openly attracted to K1-B0 and seems to think their relationship is something similar to being a couple, it's a bit unclear how he feels about her, as he doesn't really speak of her in an explicitly romantic manner like he does with Shuichi in the Bonus Mode. He does not seem to be fully aware of some of her implications, but genuinely cares about her and is very grateful for her help. It is also possible that he likes her back, but isn't aware of it.

K1-B0 was shocked when he discovered Miu's corpse in Chapter 4 and he was the only one to still speak fondly of her even after the chapter.

In the bonus mode, the two appear to be close as well, and Miu takes care of K1-B0's maintenance for their three high school years. K1-B0 tells her how grateful he is and that he will miss being able to ask her in the future. Miu is very offended by this, asking K1-B0 why he's going to throw her away, and assumes that he has other partners than her. K1-B0 tries to explain they're graduating soon, but Miu is still angry. He then tells her that it would be good to have someone like her who is good with technology to care for him. Miu answers that he can come to her place and the two agree to continue their usual habit, with K1-B0 thanking Miu in advance.