Rina twisted her body but did not resist Hiro's advances.
Hiro was completely thrilled—his little friend got hard, but since it was so small, it wasn't very noticeable.
"You can't do this to me, I'm your sister!" Rina made her last stand.
"I don't care!" Hiro grabbed her neck firmly and pulled her toward him. Against her will, he stole a kiss.
[+25 Eros Points]
Rina resisted for a few seconds before giving in to Hiro's advances.
Hiro grabbed one of her buttocks, and Rina let out a moan.
[+50 Eros Points]
Hiro was incredibly excited. At that moment, all he wanted was to rip off all of Rina's clothes and fuck her until morning.
But... Hiro looked down and clenched his teeth in fury.
He couldn't give any woman pleasure with something so small, so for now, all he could do was touch.
Hiro planted kisses on Rina's mouth, ears, neck, and collarbone while his hands caressed her breasts and buttocks.
Hiro grabbed her hair and pulled her down until she was kneeling.
"Take off your blouse!" he ordered, enjoying the sight of Rina on her knees in front of him.
"What?" Rina was surprised by the command and looked at him as if she didn't understand.
"I said: take off your blouse." Hiro repeated, stepping back a little.
"No!" Rina crossed her arms, trembling.
Hiro frowned and, before Rina's surprised eyes, grabbed her head and forced her down into a doggy position. Rina's heart raced as Hiro approached and, without hesitation, delivered a hard slap to her ass.
"Ahhnn!!" A moan of pleasure escaped her.
Hiro didn't stop and alternated between each cheek, spanking Rina.
"When I order you to do something, you simply obey," he said through gritted teeth.
"Yes, sir," Rina replied between gasps of satisfaction. She proceeded to take off her blouse, letting her large breasts hang free.
"Now take off your pants."
This time Rina didn't object at all. She lowered her pants and even her panties.
"Perfect," Hiro whispered as he took out his phone and snapped photo after photo.
He made her pose in suggestive ways before saving the pictures.
"From now on..." Hiro approached Rina and squeezed her neck with a smile. "You will be my sex toy and do everything I order you to do."
Rina didn't respond. Her expression was pure pleasure, and her eyes seemed to beg for more.
Releasing her, Hiro turned around and walked out of the room.
Rina stared fixedly at the door, as if she couldn't believe he had actually left.
Deep inside, she knew the only thing she wanted was for Hiro to stay and destroy her pussy with his cock.
Feeling horny and frustrated, she couldn't help but bring her fingers to her pussy and start masturbating.
"Ahhh Hiro anmnn!!!" Two of her fingers slid in and out of her wet vagina while her other hand squeezed one of her breasts.
Hiro managed to hear a bit of her moans and could only sigh in frustration.
When he returned to his room, he was too hot and aroused. The worst part was that he couldn't even pleasure himself.
He decided to distract himself by reviewing all the system notifications he had overlooked in the heat of the moment.
He ignored the ones that directly added Eros Points for each interaction with Rina and focused on the slightly different ones.
[Blackmail successful +200 Eros Points]
[Hidden Achievement: First Blackmail +500 Eros Points]
[Virgin Teaser: +200 Eros Points]
[You have earned more than 1000 Eros Points... Eros Shop unlocked]
[Hidden Achievement: Irresistible. Make a girl masturbate while thinking of you. +500 Eros Points.]
[First Girl Achievement +100 Eros Points]
[Eros Points: 1690]
Hiro licked his lips when he saw the notifications and so many Eros Points. Without thinking twice, he immediately went to his penis stat.
Next to the stat appeared a plus sign, which Hiro pressed without hesitation.
[-300 Eros Points]
300 of his points were deducted, and Hiro watched as his stat changed from 3/5 to 5/7.
300 points had increased his penis by two centimeters. Hiro touched his crotch but didn't feel any difference yet.
Immediately, he pressed the plus sign again.
[-360 Eros Points]
Hiro frowned when he saw the cost suddenly increase.
It was exactly 20%.
With a sigh, he checked his stat, which now showed 7/9. Still not satisfied, he pressed the plus sign again.
[-432 Eros Points]
[+518 Eros Points]
In the end, his penis stat ended up at 11/13 (flaccid/erect).
In the end, he was left with only 180 Eros Points.
But to Hiro, that mattered little or nothing. He pulled down his pants and checked his package. He didn't see any major change yet, which frustrated him, but remembering the obedient Rina in the other room, a huge smile appeared on his face.
Counting sheep, he went to sleep.
The next day he woke up sleepy and took a quick shower. While washing his crotch, he was surprised by how his penis felt.
He quickly ran to the mirror and stared at himself with wide-open eyes.
"It works!! It really works!!"
Hiro was genuinely overjoyed. He couldn't stop dancing with happiness.
He left the bathroom, changed into his school uniform, and went downstairs for breakfast.
Anna greeted him as usual while Rina practically ignored him. Yuriya served them breakfast with a smile, and they ate happily.
When heading to school, Yuriya said goodbye to everyone. Hiro took the opportunity to hug her and discreetly touch one of her buttocks.
Yuriya acted as if nothing had happened, which formed a smile on Hiro's face.
Fortunately, all three studied at the same school, so Hiro didn't have to guess where it was.
Together they took a train toward Semei Secondary School.
They found the train relatively empty and were able to get seats. But after just a few stops, the train was packed.
Suddenly, Hiro raised an eyebrow when he saw a couple starting to grope each other in the middle of the crowd.
Hiro looked toward his two sisters and the people around them, but everyone seemed to ignore the fact.
Damn it! This is the logic of a hentai world!