Soji heard the knocking.
"Come in.", he said.
As when the door opened, massive footsteps can be heard, as when the figure appeared, Soji recognized her as his eldest sister, Aiko, who was wearing light blue lingerie with massive panties, with her pink hair in a ponytail.
"Good morning, little bro!" She said, with a smile, as she plopped her massive ass onto his bed right beside him.
"G-good morning, Aiko.", said Soji as he eyes on his sister's huge ass. "What brings you here? Isn't it your turn to make breakfast?"
"Well, yes, but there's two things I have to tell you about."
"Oh, well, go ahead. I have to prepare for school.", Soji said as he walked out of bed, and was about to put on his pants.
"That's the thing... Mom was worried about you not spending time with the family due to your constant studying, so she decided to let you take a 9-month break.", Aiko said, chuckling awkwardly.
"N-n-nine months?!", Soji yelled in surprise. "B-but...!"
"Hey, now, it's mom's orders." Aiko said with a firm but lovingly tone. "Besides, you're doing pretty well. All A's in every subject, perfect conduct, never caused a commotion, you pretty much deserved this break."
"I suppose you're right." sighed Soji, as he discontinued to put on his pants, and sat down beside Aiko, who then hugs him.
"That's my lovable squirt. Best thing about it is that mom called our aunts who are the dean and principals of our college and schools and established that we can have the break, too!" She says as she puts him down. When she did, Soji notices that someone is trapped inside her ass.
"Um, sister? Someone seems to be inside your ass." Soji said.
"Oh, that. That's the other thing. Could you go in there, and check it out, please?" asked Aiko.
"Sure, Aiko." And with that, Soji used his strength to pull down Aiko's panties, spread out her ass, and dive into it. He always wanted to dive into her humongous gluteus maximums for a long time. It was quite a site. He went deep, until he saw a skinny, slim girl with tan skin, wearing a different college uniform as Aiko's.
"Please! Get me outta here!", she pleaded to Soji.
"Huh? I take it that you're being punished by my sister. Well, I can get you out, but she still would have to punish you, whatever you did." Soji took the girl's hand, and guided her out of the asscrack. Aiko felt his movements, and opened it up for him to get out with the girl.
"I knew you could do it, kiddo!" Aiko squeezed him, and puts Soji down, as when she turned to the girl, her loving smile turned into a glare of bloodlust.
"Well, well, well... If it isn't the twig bitch from my rival college.", she sneered.
"So, you do know her, then?" Soji asked.
"Yes. She is not just from a rival college, but also my "rival" well... But the point where she crossed the line was that she blatantly told me that she'll try and snatch you for herself!" She said, cracking her knuckles. "When you think that you can mess with my family, ESPECIALLY my brother... you just committed a war crime in my book."
"Well, then... Should I leave and go get our mom and/or sisters, or Karin? Or should I just leave you to do what you have in store for her entirely?"
Aiko thought long and hard about what she wanted Soji to do, until she finally decided...