Time fast-forwarded to the next day.
I was tricked! Tricked by the System!
Designating Mashiro as a Female Cuckolder and increasing her sensitivity did increase her stamina consumption, but only for truly intimate acts. Last night, Mashiro was serving Rin Ito—with her mouth, hands, chest, thighs, and feet... The increased sensitivity was only effective for her chest; it made little difference elsewhere.
Fortunately, last night Mashiro only used up the few boxes Rin Ito had bought for himself and Kaede; she didn't touch the over one hundred new boxes.
Today was the weekend, the day scheduled to meet the erotic anime teacher, S*giri. Although Mashiro had no interest in making friends, she showed some enthusiasm after hearing that S*giri draws lewd pictures.
Despite it being the weekend, Kaede and Suzu were both wearing their school uniforms. However, even the non-figure-hugging uniforms were strained by their full chests... Underneath the uniforms were the ample breasts S*giri had been longing to see.
The four didn't go directly to S*giri's house but first went to meet Saku Yosh*da. Saku's mother was especially delighted to see people coming to invite her daughter out. After all, no one had come to invite her daughter out since she graduated from elementary school.
After a few pleasantries, the four set off with Saku for S*giri's house.
When the five arrived at the Izumi family's doorplate according to the address S*giri had given them, they found someone had already beaten them to it. A beautiful girl in a white sailor uniform with bright, tea-colored long hair was standing at the door, ringing the doorbell. Her bright tea-colored hair was tied into a high ponytail, and the energetic girl still wore a bright smile even though no one had answered the door yet.
After a moment, a young man with blue hair and brown eyes emerged from the room—Masamune Izumi, S*giri's older brother. Seeing the young man, the tea-haired girl's smile grew even brighter.
"My name is Megumi Jinno. You must be S*giri's older brother, right? I'm S*giri's classmate."
"S*giri's classmate?"
"That's right! I'm the class representative~"
Masamune Izumi looked over Megumi Jinno's shoulder at the people behind her. "Are those people with you, Jinno-san?"
"Big brother can just call me Megumi." After speaking, Megumi Jinno turned around. "Those people over there... I don't know them."
Under the confused gazes of Masamune and Megumi, Rin Ito stepped forward. "Hello, I'm S*giri's friend. We arranged to come over and hang out with her."
"Eh? EH EH EH EH!???" Masamune Izumi stared blankly at Rin Ito. His recluse sister, whom he'd only met once, had friends!? And they were coming over to hang out at the house? Was he dreaming? If it's a dream, please don't let me wake up!
"Are you all S*giri-chan's friends, too? Did you come to get S*giri-chan to go back to school?" Megumi Jinno looked at the five curiously, an angel-like, radiant smile on her face. "I'm Megumi Jinno, S*giri-chan's classmate and class representative~ You can call me Megumi or Megu!"
"I'm Rin Ito. This is my girlfriend, Kaede Hoshizuki, her younger sister, Suzu, this is Saku Yosh*da, and Mashiro Shiina."
"Oh... Big brother has a girlfriend." Megumi Jinno's gaze fell on Kaede. "Big sister is wearing the uniform of the upper-classmen, huh? Ah! I remember seeing big sister helping out with morality checks at the school gate. Hehe~ Big sister is on the disciplinary committee but has a boyfriend?"
"I'm in the student council. I just help out when the disciplinary committee is short-handed." Kaede smiled a bit awkwardly. Megumi Jinno was S*giri's class representative, meaning both S*giri and Megumi were in the same school as her, just in a lower grade.
"I see. Big sister, you better watch your boyfriend."
"Huh???" Kaede was completely bewildered. What was with this little girl, who she had just met, telling her to watch her boyfriend?
Megumi Jinno didn't seem to realize what she had said, her face still wearing a brilliant, angelic smile. "Unless he likes boys or his di**k is broken, no guy can resist falling in love with me at first sight!"
Hearing her words, Rin Ito's mouth twitched... What was with this little girl casually saying 'di**k'? Is this really the Ura Sekai (underground world)?
"Pfft..." Looking at Megumi Jinno's confidently matter-of-fact expression, Kaede couldn't help but burst out laughing. She reached out and gently rubbed Megumi Jinno's head. "Talk about stealing him after your chest grows as big as mine."
Mashiro cuckolding me is one thing, but she wants to, too? Does he think he's a public restroom anyone can use?
"Grr..." Realizing she was being belittled, Megumi Jinno puffed out her cheeks cutely.
"Just you wait, big sister!" Just a Big-Boob-Monster! Cuteness trumps sexiness! Even if my chest is small now, I'll have a chance to get bigger later!
"Big brother! Choosing a small-chested girlfriend means you can play with her from small to big, but choosing a big-chested one means you can't play with her from big to small!"
"Don't worry," Kaede said, a sly, triumphant look on her face. "He and I are childhood sweethearts. We've been playing together since we were small, too."
"Ugh...." A whimper of defeat escaped Megumi Jinno's throat. I lost! A complete, utter loss!
Seeing Megumi Jinno's look of defeat, Kaede grew even more smug. Hmph... You want to cuckold me? You're too green.
However, Kaede's triumph didn't last long. She soon realized with sadness that she could only find a sense of superiority over a little girl she had just met. The truth was, Mashiro's progress in a single day was faster than Kaede's in sixteen years, and they had bought over a hundred condoms yesterday!
[DING! Host has strong self-awareness. Rewarding 100 Nurturing Points.]
"...."
Defeated by Kaede, Megumi Jinno turned her gaze to Masamune Izumi. "Big brother, can we go in now?"
"Uh... Pl-please come in." Masamune Izumi ushered the six people into the living room. Masamune was a little overwhelmed by the sudden influx of so many people.
"S*giri's room is on the second floor. I'll ask her first..." Before Masamune Izumi could finish, his phone rang. S*giri's name was on the screen.
As soon as he answered, S*giri's excited voice came through Masamune Izumi's phone. "Are my friends here? Did they bring a big-chested girlfriend with them?"
The wooden Ikkodate (detached house) wasn't very soundproof. Although Rin Ito and the others weren't speaking loudly, S*giri on the second floor still heard the voices of the seven people.
"Yes, they did..."
"Hurry up and tell them to come up!"
With S*giri's permission, Rin Ito and the others headed upstairs. Soon, the tightly closed door opened just wide enough for one person to squeeze through. Rin Ito and the others slipped inside one by one. The small-statured Megumi Jinno also sneaked in behind Saku Yosh*da.
The staircase, which had been crowded just moments ago, was now empty, and the room door was tightly shut once more. Looking at the closed door and the empty staircase, Masamune Izumi suddenly felt a sense of disappointment and bitterness... He, S*giri's older brother, hadn't been inside his sister's room in a year and had only met her once.
Yet, they were allowed in on the very first day...
Disappointed, melancholic... it felt like he had been cuckolded.