The school was on break, Akatsuki Kojou was free, and he didn't have anything to do at his home. He lay on the sofa with a bored expression on his face. "Ah... so bored..." Even though it was so boring, he didn't want to move, and even though it might be good to go out, he didn't really want to go out, considering there would be a lot of women that might trigger his urge to suck blood.
As everyone had guessed, Akatsuki Kojou was the protagonist of this world, and he was the fourth primogenitor. He wasn't sure how he had become a fourth primogenitor, but anyway, he had become one, and there was nothing that he could do at this moment. "Ugh.. so bored..." He was thinking of sleeping again, but then he noticed Nagisa, his little sister, who seemed ready to go out. "Huh? Nagisa, where are you going?" He didn't raise his body, looking at his little sister curiously.
"Kojou..." Nagisa Akatsuki stared at her older brother with a sigh and said, "Even though it is a holiday, you're too lazy, right? Why don't you go out or something? You're about to become a high school student. Why don't you get a girlfriend first?"
Kojou rolled his eyes and said, "I'm alright, you don't need to worry about me, anyway, what about you? Where are you going to go?" But then he suddenly recalled Nagisa's words before, quickly stood up, and asked in a hurry, "Don't tell me, you have a boyfriend?!" If his little sister really had a boyfriend, then he would beat up this boyfriend, or else he couldn't be called an older brother.
"........" Nagisa was lost for words and let out a long sigh.
"Wh - What? You really have a boyfriend?!" Kojou's eyes turned red at that moment.
"I don't have a boyfriend, and I'm just going to visit mom!" Nagisa quickly asked since she felt that Kojou had become troublesome.
Kojou somehow sighed in relief when he heard Nagisa's words. "Mom, huh? Are you going to check up?" He knew that the body of his little sister was quite weak, so his mother also acted as her little sister's physician. "Well, be careful."
"You're not coming with me?" Nagisa asked with a frown.
"I'm a bit too lazy, and it is quite hot," Kojou said lazily.
"Moo! Stupid, Kojou!" Nagisa shouted before she left directly from their apartment.
Kojou only shook his head and continued to sleep since he was really lazy at this moment, though he might regret his decision since he didn't know that his little sister might meet a certain someone.
---
"Stupid, Kojou!" Nagisa was still annoyed by Kojou's indifferent attitude toward her. She was on the tram and on the trip to her mother's house. They lived separately from her mother, considering her mother was quite busy with her jobs, and the location of their apartment was closer to their apartment, which was why they lived separately.
Everyone might also have realized it, but both Nagisa and Kojou were Mimori's children.
'But a boyfriend, huh?' Nagisa suddenly thought of her older brother's words and couldn't help but think about it. She was in her third year of middle school, and she would be in high school next year, but she didn't have any experience with love. She thought about all the male students in her class and could only shake her head since no one could attract her attention. She also felt that they were all too childish, but rather than worry about herself. She was more worried about her older brother since if she didn't do something, then she might have a feeling that he might not have a girlfriend in the future.
Nagisa then thought about her mother, who had divorced her father, and wondered whether her mother might have a new lover or something. After all, she knew her mother was still young, but she quickly shook her head and thought that it was impossible, considering how busy her mother had always been with her work.
Nagisa was on the tram, staring at the scenery outside absentmindedly before she arrived at the next station before she walked toward her mother's house. In her mind, she would come to check her health as usual, and there was no strange thought on her mind, and even if there was one, then it should be because Kojou mentioned a boyfriend to her, wondering whether or when she might meet her future boyfriend.
Nagisa didn't want to waste her time on the trip and quickly arrived at her mother's house. She was about to open the door, but the door of the house was opened.
"I'll go out to buy ingredients first," the young man said in a slightly loud voice.
"Don't forget to buy me a snack!" Mimori's voice sounded from inside.
"Wasn't there a lot of them before? I won't buy them for you," the young man said, then turned his head before he saw Nagisa, who was right in front of him.
Nagisa also saw the young man in front of her.
"........."
Both of them were in silence while observing each other for a while.
The young man then smiled gently and said, "Are you Mimori's daughter?"
"Ah, yes!" Nagisa answered with a blush on her face, and somehow her heart was beating very fast at that moment. She held her heart and wondered whether she had fallen in love?
"My name is Kasugano Haruka. Nice to meet you," Haru said.
"Ah, yes, my name is Nagisa Akatsuki, nice to meet you too, Kasugano-kun!" Nagisa bowed her head 90 degrees.
"You don't need to be so reserved, anyway. I'll leave first. When I come back later, we can talk more," Haru said and left.
"Um!" Nagisa nodded, staring at Haru, who was walking away, with a red face, but then she realized something. "Huh? Why is he at mom's house?" She was dumbfounded and couldn't react for a while until she remembered that she had heard a lot of rich women who kept a young guy as their lover. 'Don't tell me?!' She then, without hesitation, ran inside the house in a hurry and shouted, "MOM!!!!"
Mimori, who was eating a popsicle on the sofa lazily, looked at her daughter, who suddenly shouted so suddenly. "What's wrong? Why are you shouting so suddenly?" She wasn't sure why this girl suddenly shouted and wondered whether she should educate her so she should be more lady-like. Well, it wasn't like she was very lady-like either, but if this continued, she was afraid that her daughter might not have a husband in the future.
Nagisa ignored Mimori's question then held her mother's shoulders without hesitation. "Mom, please answer me!"
"What?" Mimori looked at Nagisa with confused expressions, wondering why her daughter showed such an expression.
Nagisa had some disappointment in her heart, and at the same time, she was glad that she didn't bring Kojou together, or else... she quickly shook her head then asked the most important question to her mother. "Mom, do I have a stepfather?"
"............"
Mimori dropped the popsicle on her hand, and somehow she wasn't sure how to react for a moment.