[I am here!]
A surprisingly familiar female voice sounded in his mind. Rin Ito froze, and then... Holy f*ck!!! There's actually a System!? Rin Ito had just tried it on a whim, never expecting Kaede to actually have a System!
This explained all the recent anomalies, from Kaede's bizarre interest in being cuckolded to his own body's inexplicable and vigorous development, leaving him tireless after multiple sessions a night. Fortunately, it doesn't seem to be a Main God Space or a Reincarnator System.
[What kind of System are you? Is Kaede's sudden interest in being cuckolded related to you?] Rin Ito asked tentatively.
He was just an ordinary person, powerless against the supernatural force of a System. The fact that this System was responding to him meant it must have a need for him. He needed to figure out the System's purpose before making any plans.
[I am not a System; I am your daughter.]
[....?] Rin Ito's brain crashed instantly. Did he finally give birth to a System daughter after being pregnant for over twenty years?
Rin Ito calmed down slightly... Whether she was pretending or an actual System, she had no reason to lie to him. A being that could communicate directly through his brain and increase his vitality wouldn't need to disguise itself as his daughter if it wanted to harm him. Although Rin Ito was a transmigrator, he was still just an ordinary person after over twenty years in this world. Unless there was something special about him that he was unaware of, she had no reason to deceive him.
And if what she said was true...
[Daddy's former name was Chen Lin. Your transmigration and reincarnation into this world caused a ripple that collapsed all other worldlines into one. Just your mere existence in this world changed the trajectory of everyone's life.]
When Rin Ito heard her say his name from his past life and the word transmigrator, he was already convinced.
[The butterfly effect?]
[Daddy can understand it that way. The ripple spread the moment Daddy entered this world, affecting the entire world and even impacting its stability.]
Rin Ito frowned, feeling uneasy. Was the World's Will going to erase him?
[Originally, the World's Will created a System based on the memories in Daddy's mind to guide Daddy in calming the ripple. However, due to the influence of the ripple, the System fell into the hands of my future self.]
[To compensate for and suppress the ripple, I used our blood ties to project the System and my consciousness onto Mommy, guiding Daddy to calm the ripple through Mommy.]
[As Daddy's daughter, my every word and action could potentially cause a larger ripple. Therefore, I can only pretend to be the System's Will. Unless Daddy or Mommy actively discovers me, I cannot explain the situation to you.]
Rin Ito nodded thoughtfully, his frown easing slightly. Her explanation was very reasonable, and Rin Ito couldn't find any flaws for the moment.
[What are the consequences if the ripple isn't settled?] Rin Ito asked curiously.
[In the future, the ripple's echoes will overlap and resonate. At best, the future of myself and my sisters will be erased. At worst, the entire worldline will collapse.]
[Wait, you just said the worldlines have collapsed into one, right? If the entire worldline collapses...]
[The entire universe will be destroyed.]
Hiss... Although it was still hard to believe, Rin Ito felt that a so-called System wouldn't need to lie to him if it wanted to do something.
[Okay, what is your name? What do I need to do? You just said you have sisters? Are they Kaede's and my children?]
[I cannot tell you, I apologize, Daddy. I also cannot tell you my name. Revealing too much to Daddy will also affect the future.]
Rin Ito could vaguely understand. The protagonists in movies always fight fate, but wasn't fighting fate a part of fate itself?
[Okay, what can I say, and what can I do?]
[The purpose of projecting my consciousness and the System into this world is simply to guide Mommy to develop an interest in being cuckolded, and to guide Daddy to become promiscuous. I cannot do much more than that. The more intentional the action, the more it deviates from my future.]
[Mmm... okay.] Rin Ito briefly sorted out the information in his mind. In the future where his unnamed daughter existed, he was a promiscuous man who had given her many sisters. To achieve this future, he needed to make Kaede, her mother, develop an interest in being cuckolded, and he needed to become promiscuous. The rest would happen naturally.
But guiding Kaede to develop an interest in being cuckolded...
[Daddy doesn't need to blame himself too much. I only serve as assistance. Mommy originally had this interest.]
[...?]
[As far as I know, even without me, Mommy wanted to show you and Aunt Suzu that she had an interest in being cuckolded, just to get you and Aunt Suzu together. Later, it spiraled out of control.]
[How promiscuous am I in the future? By the way, how do I afford to support so many women and children in the future? Forget it, you can't tell me.]
[I can still tell you a little without affecting the worldline... Although Daddy still draws manga in the future, why would those Aunts, who are so rich, need Daddy to support them?]
Well, so his future self is a sugar baby? Okay, fine. Rin Ito didn't know whether to laugh or cry. Forget it, don't dwell on this. Just let nature take its course.
[My body changes are also due to the System reinforcing me, right?]
[That's right. The System can affect anyone whose 'threads of fate' are connected to Daddy. I can show Daddy the current System Panel.]
The next second, the System Panel that Kaede usually saw appeared in Rin Ito's mind.
[Protagonist Nurturing System... what the hell is a 'Female Cuckolder'? And these reinforcements... what the hell is 'Satiety'?]
Looking at the System Store and the reinforcement options, Rin Ito nearly lost his composure. The physical fitness, length, and single ejaculation volume were one thing, but the Satiety option really broke his composure. Some grayed-out options, not yet unlocked for Kaede, even included flavor choices: Vanilla Ice Cream flavor, Cocoa flavor, Cola flavor, and so on, available for selection.
And this Sperm Blocker... No wonder Kaede said she didn't need him to wear a condom when he was with Suzu before. So there's this Sperm Blocker. He could rest easy now. The hundred-plus boxes of condoms Mashiro bought could all be turned into skirts.
In addition, there were some aphrodisiac incense options, but Kaede didn't seem to have exchanged any points for them. Kaede's main point consumption was on various reinforcements.
F*ck... Why did she reinforce Suzu and Mashiro's sensitivity? And temporary sensitivity?
And this Camera System... Rin Ito finally understood why Kaede would start masturbating whenever he had intimate contact with another girl. It was because of this Camera System.
Hmm? This Camera System can be upgraded.
[That's right! Upgrading the Camera System can add a cross-section feature, just like the cross-sections in Daddy's doujinshi. It will allow Mommy to see how the other Aunts' deepest 'baby' rooms are filled by Daddy!]
His daughter seemed to be very knowledgeable. Also, masturbating when the Camera System is on awards reinforcement points? That's too clever. Truly my daughter!
[And this... I can only touch Kaede one day after I touch another girl? Otherwise, Kaede will be penalized?]
[That's right! This is to cultivate Mommy's sexual interest. Mommy can only have intimate contact with desire with Daddy within one day after Daddy has contact with another girl.]
[For example, after Daddy has intercourse with Aunt Nanami, he can be intimate with Mommy within one day. If Daddy wore a condom when having intercourse with Aunt Nanami, then he can only wear a condom when having intercourse with Mommy. In short... whatever Daddy wants to do with Mommy must be done with another Aunt first!]
[No wonder she pushed me away when I wanted to kiss her after coming back from Sagiri's house. I hadn't kissed another girl that day.]
After seeing the System Panel, Rin Ito finally understood the reasons behind all the strange occurrences.
[Also, when having intercourse with Daddy, Mommy must apply another girl's bodily fluid. Otherwise, Mommy will be in a 'fodder' state.]
Currently, Kaede's sensitivity is 160%. 20% is Suzu, and 20% is Mashiro. These two can be eliminated by applying their bodily fluids. But what about the remaining 20%...
Hiss, Rin Ito gasped.