Ellie Rubenstein suddenly heard little Nariko ringing the bell to summon the new class of jonokuchi-ranked rikishi to their first sumo lesson with her grandfather. Ellie sprinted across the grounds, somewhat unnerved by how light hir fat-free body felt. As she ran, she was joined by Beck and Kristi.
"Hi, girls!" Ellie said with a smile. "How does it feel to go from werefox to kitsune, Kristi?"
"Feels great!" Kristi grinned. "I'm still impatient for my second tail to grow in, though."
"I'm sure it'll be any day now," Beck said. "Let's hurry. I don't want to be late to any class taught by Kyūri-sensei!"
The three arrived at the building containing the practice ring and stepped inside. They saw Kyūri, as well as the other jonokuchi: Maruko Futobara the tanuki, Akane Inarimago the kitsune, Tsubame Sorayama the karasu-tengu, Kijo Onidzuyo the oni, Hōman Harekōgan the tanuki, Misaki Satō the kitsune, and Taki Morikawa the kawauso. All of them wore nothing but white loincloths like Ellie and her friends, their breasts on full display. The loincloths also did little to hide the bulging of their cocks and balls (especially in the case of the tanuki). Ellie was relieved that shi an hir friends weren't the only ones with small bellies; Hōman was the only student who could be called truly fat, and Akane Misaki were straight up skinny.
"Welcome to your first lesson," Kyūri said. "I know some of you crave my chankonabe, but you must earn it today if you want to taste it tonight. We will begin with something simple: shiko, the leg lift. Observe!"
Kyūri lifted his leg so high into the air that it almost looked like he was doing some kind of vertical split. The old kappa held this pose for ten seconds, being very careful to avoid spilling his head water. He then brought it crashing down with tremendous force, causing the ground to shake. Misaki actually lost her balance and toppled backwards into Taki. "Now you try."
All the students did their best to imitate Kyūri. Ellie found that it wasn't as easy as it looked. Shi struggled to lift hir leg as high as Kyūri had, but holding it that was was even worse. Shi was relieved to be able to finally bring hir foot crashing down.
"And now we do it again!" Kyūri decreed.
Ellie groaned as Kyūri made her and the class repeat the exercise. Again and again, Kyūri forced them to practice the shiko. Hōman and Marujo felt their hefty ballsacks spilling out of their looincloths. By the end of class, everybody was panting with exhaustion.
"Not bad for your first day, everyone," Kyūri said. "You're all entitled to a taste of my magical chankonabe tonight. Akane, Beck, and Hōman did the best, so they get full portions. The rest of you just get a little taste to put a bit of pudge on you. Class dismissed."
Ellie sighed. Shi was a bit annoyed to work so hard to only get a partial portion of the coveted chankonabe, but it was better than nothing. At least shi'd be a little softer when shi went to bed tonight...