" Domain Expansion! Fool's World!"
Yunyi, having activated his Domain Magic, extended a finger and pressed it against his brow.
Following his guidance, the Psions surrounding his body converged towards his brow, and after a moment, a bloodstain appeared on Yunyi's brow. Then, the bloodstain split open, revealing a pale blue eyeball inside.
"Penetrating the nine heavens and observing the nine netherworlds, all phenomena in the world are but a fleeting moment in the Heavenly Eye!" Yunyi's eyes were slightly closed, with only a glimmer of colorful light flashing in the Heavenly Eye between his brows.
Suddenly, Yunyi's body plummeted towards the ground. Just as he was about to crash onto the beach, he managed to use magic to adjust his posture.
This scene startled Mayumi Saegusa and the twins. They had been wondering why Yunyi had suddenly flown into the sky and then activated his domain. The next moment, Yunyi fell from the sky. Had something really happened?
When Mayumi Saegusa saw the bloodstain on Yunyi's forehead, her worry intensified!
" Yunyi-kun, what happened? What happened to you? Why is there blood?"
Yunyi, panting heavily, waved his hand and said, "Don't worry, I'm fine."
He raised his hand to wipe the blood from his forehead, thinking to himself, "Using forbidden magic, losing only this much blood is already a bargain."
Seeing that Yunyi was truly alright except for being a little tired, Mayumi Saegusa breathed a slight sigh of relief. She knelt down beside Yunyi and carefully wiped away the bloodstains from the corners of Yunyi's eyes and the bridge of his nose.
At this moment, Yunyi had no time to appreciate Mayumi Saegusa's gentleness. He closed his eyes slightly, his mind processing the various situations around him that his " Heavenly Eye " had observed in that instant.
The first thing that came to mind was the situation with Tatsuya Shiba and the others, but Yunyi didn't think that the sense of danger he felt earlier came from them. However, in the surrounding sea, whether on the surface or the seabed, he didn't find anything that could be described as dangerous.
Yunyi's attention eventually settled on a repair ship in the sea. But the ship was only carrying out maintenance and inspection work on submarine cables. There were no large weapons or equipment on board, so it couldn't be them.
"Could it be just my imagination?" Yunyi muttered softly.
" Yunyi-kun, what did you just say?" Mayumi Saegusa confusion.
Yunyi shook his head and said, "It's nothing, probably just my imagination. I was making a big fuss over nothing. It's alright, it's nothing now."
"Really?" Mayumi Saegusa was still a little uneasy.
"Really? Let's go, I'll go play with you."
Seeing the smile on Yunyi's face, Mayumi Saegusa finally felt completely relieved. As for what Yunyi meant by "illusion," she thought it would be better to ask him when they were alone together that night.
"Is Brother Yunyi alright?"
Seeing Yunyi and Mayumi Saegusa walking over together, Izumi Saegusa asked with concern.
"It's alright, it's alright, I'm sorry I startled you."
"Alright, let's not talk about that anymore. I'll play with you guys. Or, how about we bury Little Kasumi and build sandcastles on her?" Yunyi suggested.
"Wow! Why me!?" Kasumi Saegusa in surprise, quickly jumping back a few steps to cautiously guard against Yunyi.
"Because you're the naughtiest! Building sandcastles as foundations is most fun when we have to catch you! Little Kasumi, give up resisting, you can't escape!" Yunyi grinned mischievously as he walked towards Kasumi.
"I'll help!" Izumi Saegusa echoed Yunyi, ready to contribute to the operation to capture her sister.
Kasumi Saegusa panicked and turned to Mayumi Saegusa: "Sister, save me!"
Mayumi Saegusa sighed with a helpless expression, "Sorry, Kasumi, I'm on their side too."
"Waaah! You're bullying me!" Upon hearing this, Kasumi Saegusa hurriedly turned and ran, but how could she possibly outrun Yunyi? Before she could take two steps, the little girl was caught by Yunyi and buried in the sand with tears streaming down her face.
Seeing her staring at the sky with a look of utter despair, Izumi Saegusa had laughed countless times.
Just as the sandcastle was nearing completion, Yunyi whispered something in Mayumi Saegusa's ear.
Mayumi Saegusa Yunyi in disbelief, saying, " Yunyi-kun, isn't this a bit...?"
"Huh? Don't you want to give it a try? Then let Little Izumi do it." Yunyi smiled and looked at Izumi Saegusa standing to the side.
Izumi Saegusa somewhat puzzled, wondering what the two of them wanted to do.
Yunyi leaned down and whispered in her ear what he had just said to Mayumi Saegusa.
Izumi Saegusa's eyes widened, but in the end she said, "Then I'll give it a try?"
Hearing Izumi Saegusa's voice, Kasumi Saegusa snapped out of her daze. She looked at Izumi Saegusa in horror and said, " Izumi, what are you going to do?"
Izumi Saegusa turned her gaze to the side, then reached out a hand and peered into a door at the bottom of the sandcastle.
The inside of this door faced the ticklish spot on Kasumi Saegusa's waist. Her fingers only twitched it slightly twice, and Kasumi Saegusa couldn't help but tremble.
"Hey! Izumi! Don't do this! Don't go too far! Ahahaha! Stop it!" At first, Kasumi Saegusa tried to stop Izumi Saegusa, but later, all she could manage to say were words of pleading amidst her panting laughter.
Seeing her two younger sisters making a ruckus, Mayumi Saegusa playfully slapped Yunyi: " Yunyi-kun, you're so mean!"
Yunyi glanced at her and said, "This is nothing. Look, the real experts are here."
After saying that, Yunyi took Mayumi Saegusa's hand, pinched her fingers, and tickled the soles of Kasumi Saegusa's feet.
"Hahahaha! Damn it, who is it?! No! Stop it! Please, please stop!" Kasumi Saegusa's body trembled uncontrollably as she was buried in the sand. She was laughing so hard she was almost choking, but Izumi Saegusa no sign of stopping.
As for Mayumi Saegusa, Yunyi had already let go of her hand. But her tickling of the soles of her feet didn't stop!
Despite Kasumi Saegusa's relentless struggle, the sandcastle collapsed with a deafening roar.
The little girl jumped up immediately, glaring fiercely at the three people in front of her, and said, "You people are really awful!"
"Oh no, Mayumi, run!" Yunyi grabbed Mayumi Saegusa's waist and jumped back to avoid Kasumi Saegusa's counterattack. But their dodge inadvertently betrayed Izumi Saegusa!
" Izumi! Prepare yourself!"
Like a predatory feline, Kasumi Saegusa pounced and knocked Izumi Saegusa down onto the beach. Then the twins began a battle of wits, primarily using tickling as their attack method, instantly filling the beach with the joyful laughter of young girls.