"Y-You two are to blame! You made me like this! Y-You two are responsible for finishing the job!"
Seeing Sagiri lift the hem of her sports jacket with a look of shame, Rin Ito's choice was, of course... to thoroughly take care of the situation.
Rin Ito's decision was also witnessed by Kaede.
To be honest, Kaede found it quite interesting to watch Rin Ito tease other girls now, seeing them look so disgraceful in her boyfriend's hands. Kaede always had the delusion that she was conquering them, as if she were the one who made them look so shameful, and she no longer felt the pain of being cheated on.
[...]
The system-daughter keenly sensed her mother's mentality... Although this is also the Harem route, Mom seems to be taking a slightly twisted path! Over this period, Mom had grown accustomed to the situation, treating the infidelity as a daily occurrence. She completely lacked the initial feelings of conflict and agony mixed with secret pleasure. Mom trusted Dad too much, believing Dad would never be stolen by other women... This won't do. She must correct this and give Mom a sense of crisis.
Without Kaede's knowledge, the system-daughter was brewing a series of small plans.
I've got it...
I'll discuss it with Dad when the holidays start.
...
Kaede was unaware that the system-daughter was secretly formulating a plan, and the system-daughter hadn't told Rin Ito about the plan she was constructing.
At this moment, Rin Ito was intensely 'solving' Sagiri. The petite Sagiri and Elf lay side by side on the carpet, their butts sticking up. While solving Sagiri, Rin Ito was also playing with Elf's small plug with his hand. However, Elf didn't look like Sagiri, whose eyes nearly rolled back and whose saliva stained the carpet. Only one mouth's worth of saliva stained the carpet.
Rin Ito's only regret was that Elf wouldn't allow him to fully penetrate her, but... slow training was also a form of pleasure. The thought alone of training the still-virgin Elf to orgasm just by using her backside made Rin Ito's heart race.
However, training had to be taken slowly; for now, he would first satisfy Sagiri. First, he had them lie side by side, then he stacked Sagiri and Elf on top of each other, having them take turns gently nipping each other's equally small breasts, leaving faint teeth marks on their fair chests. Finally, he lifted Sagiri as if she were a child urinating, letting the grandest fountain spray all over Elf.
Bathed in Sagiri's human fountain, Elf was momentarily spaced out. Rin Ito placed the equally spaced-out Sagiri onto Elf, burying Sagiri's face into Elf's coated chest. Although the small-breasted Elf couldn't perform a "face wash," with Rin Ito's help, she achieved the "face wash" feat with her flat chest.
The three of them met in the bathroom today and finished in the bathroom. After taking a shower together, the three returned to Sagiri's room. Elf's mouth twitched at the messy state of Sagiri's room.
"Ugh... it's sticky. Pervert, what did you do to us just now?"
"Don't accuse me unjustly." Rin Ito stated confidently. "I poured it into Sagiri's body; this is clearly Sagiri failing to hold it and leaking out."
"How could anyone hold that much in!" Sagiri raised her leg and fiercely stomped on his toe. My body is so small, and the baby room was completely filled; how could I not leak!
Elf glanced at Sagiri's still slightly red groin. Even though she had cleaned herself in the shower earlier, she was leaking a little again. Elf took the opportunity while Sagiri was focused on Rin Ito to poke Sagiri's butt with her finger... Of course, Elf didn't push too hard, as Elf knew Sagiri had only washed the outside.
"If you use your butt, you can hold it in and won't leak, right?" Elf blinked, her face sly. Although Sagiri wasn't trying to save her virginity until marriage like she was, the backside could be used just as well as the front.
"Uh..."
Seeing Elf's wicked smile, Sagiri quickly looked at Rin Ito. Sagiri was alarmed when she saw Rin Ito also wearing a cunning expression.
"Elf makes a good point."
Although Sagiri's backside had long been trained, he might as well give her some company with Elf. Competition would increase their motivation. Furthermore, with Rin Ito's bodily fluids currently stored in Sagiri's body, he didn't have to worry about damaging her.
So, Rin Ito pursed his lips and tried to look as serious as possible. "Since there are many plugs, you two should supervise each other and train your butts together."
Hearing Rin Ito say this, Elf quickly took out an identical small plug from Sagiri's materials box, lubricated it with saliva, while Rin Ito already pinned Sagiri to his thigh, making her stick out her butt.
"Ah!!!!"
"Heh heh heh..." Elf clenched her fist, holding the small plug between her fingers, as if holding brass knuckles for a fight. However... using this thing as a weapon in a fight would probably cause more mental damage than physical. Elf clenched her fist, then... punched!
"Eek!!!!!"
...
Rin Ito helped clean up Sagiri's room and sent Sagiri to Elf's house next door before saying goodbye to the two of them. By the time Rin Ito returned home, it was already afternoon. Kaede, Suzu, Mashiro, and Nanami were already home from school and preparing dinner.
After greeting them, Rin Ito returned to his room and took out his phone. Rin Ito had already received messages from Sagiri and Elf on the way, but he didn't dare open them outside. After returning home, Rin Ito finally opened the chat interface with the two of them.
Both Sagiri and Elf had sent Rin Ito a photo, and the contents of the photos were identical. The photo Elf sent was of Sagiri sticking out her butt, and Elf squatting next to her, giving a 'V' sign next to her butt. Sagiri's photo was a photo of Elf's butt. These were their "reports" on mutually supervising each other.
Rin Ito had agreed with them that they would send a photo of the other person in the morning, noon, afternoon, and evening to report on the training progress. If they found the other person dared to secretly remove it... Heh heh heh, then they would have to accept even more severe training. Starting with the smallest size for two days, then switching to a slightly larger one and gradually increasing it until the training was complete... If Ami and the others weren't in school, Rin Ito would have called them to join as well.
Although Ami would definitely be interested if he called them, Rin Ito would not let them undergo this training while attending school. Explicit content is one thing, but reality is another. If they were exposed in real life, their lives would be ruined, and Rin Ito would not take that risk. Just like making Sagiri orgasm and pee at the comic convention with her eyes wide open, Rin Ito definitely wouldn't have let Sagiri do that without the system-provided item.
But now... the holidays were approaching.