Deciding to start with her right foot, you grabbed the sole of her foot with both hands and licked her big toe in one firm motion.
Finally, you licked a girl's foot for the first time in your life, it felt indescribably good, you can't compare its taste to anything else, because it was more delicious than anything you've tasted so far. It was also Ushiwakamaru's first time, to have someone lick her feet, but her reaction was a low-pitched and cute moan.
After the lick, you looked back at Ushiwakamaru and saw that she was blushing and covering her mouth with her left hand. He's probably sensitive to his feet, but that just makes licking it all the more enjoyable.
The first lick was done, you will continue to lick her big toe first, and then move on to the rest. You kept licking her big toe and the licks made Ushiwakamaru keep moving her feet and moaning.
"A-Aruji-dono..., so that's what you were talking a-about when you said the trial... was hard to c-complet". Ushiwakamaru said stuttering as you kept licking her toe.
You were so engrossed in licking her feet that you couldn't answer her back.
You felt like you've licked her big toe long enough (after 10 minutes) and now you're going to start licking all five of her toes.
You had your tongue on her big toe and then you slowly dragged it through all of her toes all the way to her pinky toe.
Ushiwakamaru covered her mouth to make the sounds as quiet as possible, but they were plenty loud enough for you to hear, which made you lick her feet over and over again.
You kept running your tongue over her toes which made Ushiwakamaru more and more uncomfortable, but she didn't want to tell you as she really wanted to help with the Trial (Ushiwakamaru was still sitting on the bed).
You licked her toes long enough to make them drool, which was your sign that it was time to lick her soles. You let go of her sole with your hand and grabbed her ankle instead, Ushiwakamaru also noticed this and began to wiggle her freed toes.
"A-Aruji-dono... what are you going to do... Ah?!" Ushiwakamaru exclaimed as you started to lick her soles (she was still sitting there).
First you started licking the soles up and down, and when you licked upwards you often went up to the toes. Ushiwakamaru's sensitive feet found these licks incredibly unpleasant, which made her moans louder and more frequent. After a while, licking her soles up and down was replaced by left and right licking. You focused on getting your tongue to cover as much surface as possible on Ushiwakamaru's soles. The taste of the soles was also phenomenal, and the fact that Ushiwakamaru is embarrassed and struggling all the while, just adds to the flavor of her feet.
You licked her soles and toes for several tens of minutes and by the end, Ushiwakamaru was starting to get used to it a little bit, as she moaned a little quieter.
That's when you decided it was time to get back on her toes, only now you will do something else besides licking.
You dragged your tongue one last time from the heel of her sole to the top of her toe, then you bent her legs towards you, (Ushiwakamaru looked interested and a little panicked at what you were going to do) you opened your mouth and started sucking her big toe very hard.
Ushiwakamaru couldn't take it anymore, she moaned loudly, then she had to lie on her back, she involuntarily stretched her left foot and opened her toes, and began to jerk the other leg pediously (you expected something similar based on how she had reacted to the licks so far). This bothered you in sucking her toe, so you gripped her right sole tightly with your left hand. Your tongue circled around her big toe, which only added to Ushiwakamaru's 'torture'.
Meanwhile, Ushiwakamaru was feeling very uncomfortable and her face was completely red, she was moaning continuously while covering her mouth with both hands and her eyes were tightly closed. But you weren't willing to back down from the toe-sucking yet, and also your tongue continued to lick.
"Oooooh it's so uncomfortable, I can't hold back my voices, but I have to bear it because I promised to Aruji-dono that I'd help him do the Trial, and I owe him anyway, because he taught me how to play chess, but it's still very strange feeling how Aruji-dono licks me my feet." Ushiwakamaru said to herself as she struggled with the unpleasant sensations from licking her feet.
You sucked her big toe for half an hour and Ushiwakamaru's moans didn't stop.
After that, you stopped sucking her toe, Ushiwakamaru also stopped moaning and moving her feet. You also looked at her as she leaned up, and a little drool could be seen coming out of the corner of her mouth.
"Are you ok Ushiwakamaru?" You ask politely (although you will continue to lick her foot regardless of the answer).
"I... I am fine, don't w... worry about me, just keep going". Say Ushiwakamaru with a forced smile.
"Well, if he said I could go on, I had no reason to hold back". You say to yourself as you plan to suck her index toe.
You didn't even hesitate, after her answer you took her index toe in your mouth almost immediately and started sucking and licking.
To tell the truth, Ushiwakamaru was surprised that you immediately resumed sucking her toes because she expected you to stop for a while to rest. In addition, she reacted to the sucking of this toe with very cute moans and feet wiggles.
You sucked through the remaining four toes in a long time, during which Ushiwakamaru tried to moan as little as possible, but was effectively unable to do so due to her sensitive feet and toes.
After finishing sucking her little toe, you leaned back a bit again, lifting Ushiwakamaru's foot a little by the sole, which she also noticed. You opened your mouth wide, which made Ushiwakamaru question you.
“A-Aruji-dono, why did you open your mouth so wid.... AH!!" Ushiwakamaru interrupted her setence again, as you began to suck all five toes on her right foot.
The feeling when all of her five toes are in your mouth and your tongue is constantly licking them is something amazing. Also, Ushiwakamaru's moans make you want to suck her toes even harder. On the other hand, Ushiwakamaru is completely in despair, she can't stand how all five of her toes are being sucked at the same time, her moans are louder than ever before. And you make sure that as much saliva as possible covers her toes while sucking, because on the one hand it excites you, and on the other hand, it's probably a very unpleasant feeling for Ushiwakamaru (which also excites you).
Sometimes you intentionally stop sucking her toes for a few seconds, waiting for Ushiwakamaru moans to stop, and then quickly start sucking her toes again, so that you can 'torture' Ushiwakamaru even more.
"This is getting harder and harder to take, I feel like I might pass out at any moment, and anyway it's very embrassing, I make strange noises in front of Aruji-dono as I promised him that I'll make it through the Trial". Ushiwakamaru said to herself as she tried to convince herself to ease her discomfort.
"Ushiwakamaru is trying hard to resist, but the poor thing doesn't know that we're not even halfway there". You smile to yourself as you enjoy the taste of Ushiwakamaru's feet to the fullest.
You spent more than half an hour sucking her five toes, Ushiwakamaru moaning all the way and sometimes biting her own hand to hold it back. At the very end, you suck really, really hard on her toes, making every muscle in Ushiwakamaru tense up.
You then took her toes out of your mouth, and leaned back. Ushiwakamaru perk up a little (since she thought you were done), she smiled sincerely but it was quickly replaced by despair and she was shocked when she saw you touch her left foot.
"A-Aruji..dono... d-don't... tell me that... Ah"! She reacted when you started licking her soles.
But now, instead of licking up and down, you began to lick around with your tongue, which had a completely different feeling. Ushiwakamaru also liked this a bit better as it wasn't as strong as sucking, but it was still uncomfortable for her and she moaned more softly.
You wanted to apply an extra dose of saliva to her feet, so you tried to lick her soles and toes as thickly as possible with your tongue. Ushiwakamaru's entire sole was soon covered in saliva, which she clearly didn't like as she tried to shake it off, but of course you didn't let her and you licked more saliva on her sole.
After licking and licking her sole, you've decided it's time to move on to the toes.
As a novelty, you decided to lick between her toes, which was also unknown to Ushiwakamaru, so she yelped in surprise.
You try to supply as much saliva as possible to the parts between her toes, and her toes that have not been licked so far, and as soon as one of the toes was sufficiently salivated, you went to the next one.
You've been "torturing" poor Ushiwakamaru with your fetish for quite some time now, so now you can decide... whether you're going to End the licking now or Continue because it still hasn't been enough for you