Hisoka just wasn't as good with fuda as Tsuzuki, which frustrated him. He didn't have the patience to write the characters over and over again with the required flawlessness. Finally, Tsuzuki proposed private lessons, and Hisoka agreed.

     Upon arriving, he looked around Tsuzuki's bedroom. "Where's the ink and paper?"

     "Here's the ink," Tsuzuki said from the mattress, holding up a can of dark chocolate frosting, "and the paper is sitting right here." He gave Hisoka a smile which was unbelievably innocent. "Write one perfectly, and you can... erase it."

     It didn't exactly help Hisoka learn patience, but practice made perfect.