Tazuna and his new friend Koyori have a problem: If Tazuna lets go of Koyori's hand, she'll die! Can he take her home with him and explain to his parents why he now has to live with a girl? And how's he going to take a bath with her!?

Tazuna meets Chizuru and Hayate, the pair who's car he fixed on the day he met Koyori. They're workers for a major food corporation in the area, and they offer to treat him and Koyori to dinner as a thank you. But after the meal, they reveal that they're actually Hand Shakers themselves!

It's time for the School Festival, and Tazuna's class is in big trouble! The machinery's broken and the cooks broke their arm, and they've got no way to get the cheap ingredients they need for their food stall. Can Tazuna use the connections he's made so far to make everything right? And can Koyori learn to cook in time?

Tazuna and Koyori battle Awaza Kodama a second time, and she's just as powerful as the first. Tazuna, and Single Gear, cannot hope to defeat her. Their only choice is to rely on Koyori's unseen strength.