"I've got you now!" Yang said as he grabbed Yin's hands. "And you know what that means!"
Yin whimpered slightly as Yang brought her towards the easy chair and pushed her into it, making her sit down on it. He put her hands behind the chair and locked them into place with handcuffs. With a rope, he tied her feet to an ottoman in front of the chair. He also pulled up her shirt to expose her stomach and ribs. Yin shook her body around and tried to break free, but to no avail. She was trapped.
"Yang, please! I don't want to do this!" she begged.
"Oh, don't worry, Yin. We're both in for a good time!" Yang replied.
Yin didn't think so. Judging by the way she was restrained, and how her shirt was lifted up, she could tell that she was going to be tickle-tortured. She hated that with a passion, but she hated tickling itself even more. She found it completely pointless, and it didn't help that she was so ticklish. Yang, however, absolutely loved it. He had always tickled her, but this was the first time he would ever do something like this. In his mind, it was just for fun, but for her, it was one of her worst nightmares.
Yang brought up both of his forefingers and sent them towards Yin's feet. She cringed and looked away as she saw him do this. Slowly, he started to move his fingers around both her feet, attempting to tickle them. Yin's reaction was near instant. She tried as hard as she could to hold her laughter in, even though it seemed like the tickling feeling was just too much. Right away, it tempted her to surrender and get laughing, but she managed to resist that reflex.
Yang removed his fingers and switched to the underarms. The kind of shirt that Yin was wearing had big enough sleeve holes to reveal both her armpits, which seemed like a setup for Yang. In the exact same way that he tickled her feet, he began to tickle her armpits, expecting as much laughter as before. Yin again tried not to laugh due to the tickling sensation, but was much more successful than before. Yang removed his fingers and looked down at her stomach. If her feet and underarms weren't ticklish enough for her to begin laughing, her weakness must be her torso.
He raised up his right hand and moved it towards Yin's stomach. When he got close enough, he started wiggling his fingers around, which really tickled her. Yin lost all of her strength and finally broke down into laughter. "HA-hahahahahahaha!"
"This must be it!" Yang said to himself and moved his other hand over to her to tickle her with that hand as well. Yin could only helplessly flail around with her laughter. She clenched her fists and shook her head repeatedly, but she couldn't do anything to break free.
"HAHAHAHAHAHAHA! STOP IT!" Yin managed to say, despite her laughter. Despite that, Yang kept going, tickling all over her stomach and briefly switching to her ribs, getting just as much laughter as before. "HAHAHAHAHAHAHA!"
"YANG..." Yin tried to catch her breath, but due to being tickled, it was a true challenge. "HAHAHAHA! I SAID, STOP IT! HAHAHAHAHAHAHA!"
"I'll never stop it. You'll have to beg." Yang continued to tickle her.
"HAHAHAHAHAHAHA! PLEASE! HAHAHAHAHAHAHA! Hahahahahahaha..."
Yin's laughter began to weaken. Perhaps she was on the verge of passing out. Yang stopped tickling her and pulled his hands away from Yin. She stopped laughing and tried to catch her breath, expecting the torture to finally end. Yang looked back down at her feet. If Yin could control her laughter before, maybe he could get her to laugh by tickling her feet now.
Reaching into his shirt pocket, Yang pulled out a single feather. Yin saw what he was holding and gasped in fear. She tried to cover her feet by putting them on the ottoman, but it didn't work. "Yang... you wouldn't dare!"
"Or would I?" Yang countered. Slowly, he began to tickle Yin's feet with the feather.
The moment the harmless but effective weapon touched the soles of her feet, Yin completely lost control and broke out into loud laughter. Her feet were much more ticklish when a feather was used on them, but if they were tickled without one, they only tickled about half as much. "HAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!"
"I thought you weren't any good here," Yang stated.
"HAHAHAHAHAHA! YANG... HAHAHAHAHAHA! I SWEAR... HAHAHAHAHAHAHAHAHA! I WILL... HAHAHAHAHAHAHA! KILL YOU! HAHAHAHAHAHAHA!"
"And how are you gonna do that?" Yang asked.
"HAHAHAHAHAHAHAHA! WHEN WE'RE... HAHAHAHAHAHAHA! DONE... HAHAHAHAHAHAHAHAHA! THEN... HAHAHAHAHAHAHAHAHAHA! IT'S... HAHAHAHAHAHAHAHA! MY TURN! HAHAHAHAHAHAHAHAHA!"
"So you think you can get me as much as I'm getting you, huh?" Yang continued the tickling, caressing his sister's feet with the feather as she continued to laugh her head off. Her eyes were watering with every second he tickled her. "Well, you can't!"
"HAHAHAHAHAHAHAHAHAHAHAHAHA! PLEASE... HAHAHAHAHAHAHAHHAHAHAHA! STOP... HAHAHAHAHAHAHAHAHAHAHA! I CAN'T... HAHAHAHAHAHAHAHAHA! BREATHE! HAHAHAHAHAHAHAHAHAHAHAHA! Hahahahahahahahahaha..." Yin again lost her breath and her laughter got softer and softer before they stopped all together. Closing her eyes, she passed out and began to sleep.
With that, Yang stopped tickling her and removed the feather before putting it back into his shirt pocket. He set Yin's body free from this position. What he didn't know was that Yin was planning to get revenge on him later, when she wasn't so tired out.