After walking briskly on the treadmill for over ten minutes, Iroha Iroha began to pant slightly. She turned her head in confusion, looking around but not seeing Chisato's figure.
Where did he go? The gym's entrance had vending machines; it shouldn't take this long to buy a drink.
Iroha paused the treadmill and, as she was about to consider calling him, Chisato appeared in her line of sight.
To her surprise, he was accompanied by a very attractive woman.
Given that Chisato had been gone for so long, she naturally started imagining some inappropriate scenarios between the two.
Damn Chisato, leaving his sister here while he flirts with someone else. How disappointing.
However, as they got closer, Iroha's initial assumptions quickly disappeared.
The woman's appearance, to put it bluntly, was not particularly attractive, and she seemed to be in her thirties.
It was hard for Iroha to imagine Chisato being interested in someone like that.
"Let me introduce you. This is Isshiki Iroha. Iroha, this is Miss Nakamaki, the slimming coach I specifically found for you."
Chisato approached Iroha and made a brief introduction. The female trainer greeted Iroha warmly.
After a polite handshake, Iroha seemed a bit taken aback,
"A slimming coach?"
"Yes, Miss Nakamaki is a professional. She knows the most scientific ways to lose weight. Following her advice will definitely be the right choice."
Chisato explained.
Iroha whispered to him, her body still radiating heat from the earlier exercise,
"Why did you suddenly find a coach? Doesn't that cost a lot of money?"
"You don't need to worry about the money."
"It's already been paid and non-refundable. I thought about it last night and decided it would be better to have a professional guide you."
"After all, I'm only an amateur, and if I give you the wrong advice, it would be a waste of your time."
"Did you ask that woman how she will teach me?"
"Call her coach."
Chisato lightly tapped Iroha on the head. She responded cutely by touching her head and pouting.
"She's a professional in this field. Just follow her instructions when she shows you what to do."
"Okay."
"Then, I'll work out over here in the equipment area. You can go with her."
"Okay."
As Iroha turned away, she flashed a bright, charming smile at the coach.
"Please take good care of me, Coach."
"You're too polite. Please come with me."
…
[You watched Iroha leave with the coach, a satisfied smile on your face.]
[Everything is going perfectly. If nothing goes wrong, you'll have a legitimate reason for a significant amount of close interaction with Iroha for a considerable time.]
[You restrained your excitement and started running on the treadmill.]
[Iroha followed the coach to the other side of the gym.]
[Listening to the professional terms used by the coach and seeing her very slender figure, Iroha became more convinced of her expertise.]
[When the coach introduced the exercise ball, Iroha followed along without hesitation.]
[After working out and resting for two hours, Iroha's session ended. She was not used to such intense exercise and felt soreness and fatigue in her arms, waist, and legs.]
[The coach used professional techniques to gently pat Iroha's arms and thighs.]
[She recalled Chisato's earlier instructions, which included advice to buy a fitness ball since it was inexpensive and available in nearby stores, and to perform exercises at home if busy with studies.]
[The coach also mentioned that consistent exercise over the coming days was crucial, even if it caused soreness, to avoid counteracting the benefits of the hard work.]
[If the soreness was severe, light self-massage could help alleviate it.]
[Iroha nodded in understanding and, after saying goodbye to the coach, found you.]
[When you inquired, she said the coach was very professional and, playfully shaking your arm, asked you to buy a fitness ball for her.]
[After returning home, Iroha no longer resisted dinner, as the coach had advised her to maintain regular meals.]
[At ten o'clock at night, while you were focused on your desk, Iroha knocked on your door, peeking in with a shy expression.]
[She asked if you could spare some time to help her with something.]
[Feigning curiosity, you nodded and asked what it was. Iroha waved you over and said you should come to her room.]
[You turned off your desk lamp and followed Iroha into her room, your lips curling into a smile. Everything was proceeding according to your plan.]
[First-person perspective.]
"Playing with the ball?"
"Not playing, but doing exercises with the fitness ball."
Wearing shorts and a tank top that exposed a lot of her smooth skin, Iroha corrected Chisato.
Chisato had no objections to her wearing such attire at home.
If the Isshiki couple weren't around, he wouldn't even mind if Iroha showed off in a swimsuit or a nude apron.
"Isn't that still playing with the ball?"
"Hmph, I can't be bothered to explain."
Iroha looked disdainful.
Not bothering to explain, the clueless younger sister. The coach's instructions were exactly what he asked her to say.
Chisato shrugged off her contemptuous look,
"Alright then. How can I help you?"
"It's simple. When I do some movements with the fitness ball, just lightly hold my arms or support my waist to prevent me from losing balance and falling."
"Got it."
"Let's start then."
"Okay."
"Oh, and… don't touch any inappropriate places!"
Iroha recalled the things she and Chisato did when they were less mature.
For the slightly uneasy Iroha, Chisato responded with a light laugh.
Her unease dissipated with this reaction.
"Alright then, let's get started. Support my waist, and when I lean back, slowly place me on the fitness ball."
Following the instructions, Chisato moved in and wrapped his arms around Iroha's waist.
After many years, he once again embraced the slender waist of the girl.
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