Nighttime.
After dinner, and with tomorrow being Monday, Rin Ito sent the girls who had received their proof of friendship home one by one before finally returning to his own place. It was around ten o'clock at night.
"Welcome back~" Nanami, who was practicing voice acting in the living room, tucked her tiger plush behind a cushion. "Um... Kaede said to tell you to go to her room when you got back."
"Mhm, I know." Although he agreed, Rin Ito was puzzled. Why did Kaede need Nanami to pass on the message? And the System Daughter hadn't sent any messages either... Has Kaede finally given in after holding out for so long?
Rin Ito suppressed a smile and said, "I'll head over now."
Arriving at Kaede and Suzu's door, Rin Ito looked up. The living room on the first floor was dark; only Kaede's room had a light on. The two must be in Kaede's room. Taking out his key, opening the door, and passing through the entryway, Rin Ito was about to cheerfully walk upstairs to see what they were planning when...
"You're back."
"Holy shit!"
Suzu's slightly cold voice drifted out of the darkness. Turning his head, Rin Ito vaguely saw a figure sitting on the sofa, visible in the moonlight.
Suzu turned on the living room light after seeing Rin Ito jump in surprise. Suzu, wearing light shorts and a short-sleeved T-shirt that showed off her long legs, stood there beautifully.
"Why were you sitting here with the lights off..."
Slap~ Rin Ito gave Suzu a light tap on her butt. As he got closer, Rin Ito smelled a shower gel fragrance, and... judging from the feeling just now, Suzu wasn't wearing underwear beneath her shorts, and two points of arousal could be seen subtly jutting through her T-shirt.
"What are you two plotting?"
"Kaede and I went to see Eiri, Misaki, and Marin today."
"What did you talk about?" Rin Ito asked curiously. The System Daughter had told Rin Ito about them meeting Eiri and the others, but she hadn't told him the details of their conversation.
"Eiri told Kaede today that you've been targeted..." Suzu roughly recounted the day's events to Rin Ito: Marin wanted Suzu to cosplay as Shizuku, and with Suzu's persuasion, Marin also agreed to cosplay with her—they weren't going to a convention, just playing at home. In addition, Kaede wanted to lend him to Misaki and Eiri to experience the scenes from Kashiwagi Eri's doujinshi and the like.
"Wow..." Rin Ito didn't know whether to laugh or cry. Is this a mission from the System Daughter? Or does she want to do this herself? But... Kaede has only met Misaki and Marin once. Although Kaede had developed a certain level of interest in this kind of thing through the System Daughter's 'training,' her personality wasn't usually this proactive.
That left only one possibility: Eiri... She's holding a grudge! Based on Rin Ito's understanding of Kaede, her capacity for pettiness was not as large as her chest. Eiri making Kaede wash her underwear last time must have genuinely angered Kaede.
"So... Kaede specifically asked me to come over just to tell me this?"
Suzu shook her head. "Follow me." Suzu led him to Kaede's bedroom door, still under Rin Ito's confused gaze. She pressed the doorknob, but instead of opening it immediately, she paused before pushing the door open forcefully.
"Ta-da~" Suzu spread her hands and made a welcoming gesture toward Rin Ito. Following Suzu's line of sight, Kaede was sitting on a chair, facing the door. She was wearing the same short-sleeved shirt and shorts as Suzu. Although, like Suzu, she wasn't wearing a bra, and two points of arousal could be subtly seen, she had a few extra things on her.
Two black thigh-high stockings bound her legs to the chair legs, and her hands were raised above her head and exposed, tied behind her head, revealing her smooth armpits. Rin Ito could faintly see a pair of velvet-lined handcuffs binding Kaede's hands to the back of the chair. In addition, a ball gag was stuffing Kaede's mouth, forcing her to drool and utter only muffled whines... Rin Ito found this ball gag very familiar. Isn't this one of the 'research materials' Mashiro bought before? Well, at least it's being put to good use.
"Punishment," Suzu said simply.
Rin Ito looked at Kaede, who was tightly bound to the chair, with a smile. "What did you do to upset Suzu this time? Or did Suzu catch you masturbating to the sound of my voice again?"
"Uggghhhh!!!" Kaede struggled to speak, but the ball gag only allowed muffled moans to escape her mouth.
"How do you plan to punish her?" Rin Ito leaned close to Kaede, gently tickling her smooth, hairless armpit. Kaede's body squirmed, and the wooden chair let out a grating squeak.
"Like this." Suzu said, then kissed Rin Ito's lips. Her soft, white chest, a size larger than Kaede's, pressed against his chest. Her slick tongue parted Rin Ito's teeth, greedily sucking his saliva, making smacking sounds. Her hands guided Rin Ito's hands to her chest and below her waist.
"Whoa!!!" A short cry of sorrow escaped Kaede's mouth, but it wasn't because her sister was getting physical with her boyfriend. It was because...
[Ding~ Timed Quest.] [Quest Content: Achieve climax before Rin Ito and Suzu Hoshizuki finish.] [Quest Success Reward: One Bottle of Empathy Potion.] [Quest Failure Penalty: Inability to achieve climax for 7 days.]
The quest content itself was nothing. Achieving climax while masturbating during Rin Ito and Suzu's activity was an everyday occurrence for Kaede. Even though it had changed from watching the camera system to a live broadcast, it only made her a little shyer.
But the problem now was... How am I supposed to achieve climax when I'm tied up like this!? Forget masturbation; with her legs bound to the chair legs, she couldn't even rub them together... Isn't this an unwinnable quest? Didn't the System say it wouldn't issue unwinnable quests?
[That is for other Systems. This System has never made such a statement. However, this quest is not necessarily unwinnable.]
Then how do I complete the quest under these circumstances?
[The Host is advised to utilize imagination.]
Utilize imagination? No matter how much I use my imagination, Suzu won't untie me today! Should I beg her? My mouth is gagged; even if I wanted to beg, I couldn't!
[This System means that the Host can utilize imagination to achieve climax through visualization. This System has said all it can. The Host is encouraged to reflect deeply.]
... Kaede was speechless. Reflect deeply, my ass! Achieve climax through imagination alone without physical contact? How is that possible!
However... looking at Rin Ito and Suzu embracing, Kaede had a daring thought. She had been manually stimulating herself so much before that she subconsciously felt a climax required manual effort. But the System only said to achieve climax; it didn't restrict Rin Ito and Suzu from assisting! If they helped, wouldn't it be easy?