You: Why is Akane and Nao's ship name Nissan Combo? Isn't that a car brand?? What's a car brand have to do with an anime?
Well my friend, Nissan is a car brand and there are cars called Nissan Sunny and Nissan March so naturally, that will be their ship name. NISSANコンビ is how you would write it (I suggest copy and pasting that into Google to see a lot of pictures of them).
Imagine Yayoi in the background like 'I SHIP IT!!'