"Sorry!" A girl in high school attire could be seen holding the hand of the boy who had finally found the courage to propose to her as tears began to fall from her eyes.

After all, she had no chance of being with the boy in front of her at the time, and she had already been captured by the man who would do anything to get his hands on her body and soul, even if it meant murdering the person sitting next to her.

"Idiot, it took you too long to say those words, and now I am already someone else's possession, not someone with her own free will."

Holding his face as tears streamed from his eyes, the girl's lips turned into a silent smile as she kissed his, and with that, she may have given herself a chance to survive this life.

"Don't worry, silly; I know that you will find someone to fall in love with."

Saying that she left the area, leaving the boy stun as he continued to look at her and felt his final flame within his chest finally settling down forever.

"Damn..." As Kai stood there and continued to look in the direction she left, tears began to leak from his eyes, and he had to clench his hand to keep them from falling.

He was currently experiencing a bittersweet and palpable sense that something in the very core of his being was changing, but he was unaware that a typhoon was about to enter his life.

"Ring!" Kai's phone rang as he sat on the edge of the waiting seat, a tear running from the side of one eye as he glanced at the screen of his smartphone.

"Dad! Yeah, he did say something about family meetings and all for today." Looking at the name, Kai let out a small chuckle, as he picked up the call and found it ending from the other side.

"Damn, old man, are you messing with me or something."

Kai muttered as he called back his old man, and finally the other side seemed to have picked up his call and answered, "Kai! Where are you punk? Why are you getting late for meeting your new family member, you idiot?"

Kai's blood pressure really spiked, and he wanted to slam his phone, but he restrained himself and asked instead.

"What is it now? What new family are you talking about?" As it was the first time Kai had heard it and only felt it coming, Kai muttered under his breath.

This was going to be the moment when his life would change.

'What is he talking about, that idiot dad? But this feeling, I am sure something drastic is about to enter my life for sure.'

After all, Kai had relied on this sensation since he was a young child, and he had developed a special capacity that allowed him to sense changes in his surroundings.

He therefore held this sensation inside his chest.

Although all it accomplished was to alert him to any impending changes, big or small, in his life, it was also thanks to this talent that he was able to foresee that something was not right with her—with Shiina Mashiro.

Thinking about her figure, Kai felt a pang of regret and pain walling inside his chest and decided to go and see what his dad was speaking about, directly to the hotel he had asked him to come to as soon as possible.

"Oi, brat, come here!" Kai looked at the side of the road, where Kai dad, who had similar common looks that can be found at every corner, was waving at him.

But do not base your opinion of him on how he appeared because he was a total scumbag with multiple relationships, even though this country did not outlaw polygamy for its own reasons.

"What is it, old man?" Kai took some time to cross the street because he discovered his father standing next to three young girls, who were not even 7 or 8 years old.

"Eh! No way!" The three kids, who had adorable expressions on their faces and were standing next to their father, were looking at Kai with a mixture of worried, scared, and excited expressions as Kai muttered.

"Good evening, big brother." They looked at Kai as if they were waiting for him to engage them in conversation before the three of them spoke at once with a burst of smiles on their faces. [Image of sister will be given at this comment section.]

"Eh! Yeah, good evening, little one's." Kai almost stammered in his speech as he extended his hand toward one of the little ones, who looked the most active among the three.

As Kai glared at his grandfather, who was only grinning wryly, he explained the circumstances surrounding the three children, whose mother had been a prostitute working in a foreign country who had fallen in love with his father's friends and formed a family before recently contracting a rare disease and passing away.

Kai's father made the decision to pick up the three children after seeing them being sent to an orphanage with a bad reputation.

He called Kai for this purpose but could not bring himself to discuss it over the phone and instead decided to call a family meeting.

Then Kai turned to face the three girls, three of whom had expressed concern about returning to that location and were looking at him with concern.

"Big brother, we will be good girls, so don't send us back." When one of them noticed Kai looking at them and hearing what they were both saying, she almost started to cry.

"What are you saying? Why would I send such cute little sisters back? So, call me big brother like always, and we will be family." Kai pulled the adorable blue-haired girl and placed her on his lips while patting her head, revealing a small smile on his face.

As they looked at Kai and jumped on the seat next to him, the three young girls began to smile like blooming flowers and expressed a desire to be spoiled by him.

The father of the family, who appeared content with everything, called the waiter for the order, ordered everything that was heavy from the list, and the five members of the family began to enjoy their meal as the busy street continued to move through the busy city.

"Okay, then kid, I have my own work; take care of your baby sister, and from tomorrow you have a weekend, right? So, bring them out for shopping; I will send the money into your account around tonight."

After saying that, he left Kai in the living room and sat motionless in the chair, watching the three girls playing in the corner of the room.

The girls were running around and smiling.

At the same time.

"Look, they are done talking, but our brother is so cute, right?" One of the girls muttered as they observed Kai, who was sitting to the side and conversing with their adoptive father while suppressing emotions that were obvious to them from the outset.

She had brownish blond hair, and when she caught a glimpse of Kai's occasionally glum expression, her eyes began to light up brighter.

"He must have been rejected by a girl or something, as I can tell from my experience." The purple-haired girl spoke as she drew her sister, who had blue hair but was not reincarnated like the other two of them, closer and gave her a bear hug.

"Can't we cheer him up?" The blue-haired girl was the slowest of the three, but she was also the kindest, and she wanted to see her brother smile again as a blue screen floated in front of her, bearing the name "Almighty Brother System." on the system panel.

"We will, considering that he resembles a cheat in our lives and that the setting described in the book fits him. I really like this stupid brother who waited so long to ask that girl out and then lost her to the main character, whom the three of us despise."

Three of the little girls were making plans on the side while Kai, who was unaware of his sister's true personality, was thinking about tomorrow. They pretended to be playing together while actually planning something.

Since Kai was the reason that the two of them were given a second chance to live in this world, it was their responsibility to make Kai the world's strongest brother so that, in turn, bro-cons like them would gain the world's strongest brother.