'Just what is going on with onii-chan today. She hugs me out of nowhere and making expressions that I never saw before'
While Ryan was thinking about his past life vengeance and his blissful reunion with his family, his little sister Aiko was also thinking about him in return.
It was a vacation before the start of their high school life.
Today, both of them went to the park to relax for a bit after they finished their chore.
Usually, the vacation was the time when they travel to the tourist area to have fun or visit their relatives. Unfortunately, their economic condition was average at best, not to mention they no longer had any relatives since mom's marriage with the late dad wasn't approved by their family, thus made them lost contact with their relatives.
Even then, she was still happy since she still had her mom and Ryan.
Originally, both she and Ryan was a childhood friend.
Ryan's dad was an Indonesian that works overseas in Japan before he married a Japanese female and stay at an apartment room beside her family's room.
Thus the two of them often play together since childhood, since not only because they were neighbor, but also because both of their parents that was also close friends.
Their days were quite happy, until that day when there was a traffic accident where they lost Aiko's dad and Ryan's parents.
The three of them were on a business trip, leaving both Aiko and Ryan at the apartment along with Aiko's mom that act as their caretaker.
They lost their family when they were still 4th graders, thus leaving Aiko's mom to be a single parent.
At first, Ryan was about to be taken care of by his relative from his mother's side, since his dad was an orphan.
But both she and mom were opposing it vehemently since Ryan's family from his mother's side possessed the same disposition like her mom's family, Harumi clan.
Maybe because they thought that it wasn't worth it to be in the bad side of the former young miss of large clan over a brat, but in the end, they relent to her.
They start to become a family, and even though Aiko always called Ryan by his name, sometime he will call him nii-san or onii-chan depending on her mood.
Since Aiko seldom called him 'brother', it made Ryan think wether Aiko still can't accept him as her family.
Ryan was right on the mark when he thought that Aiko can't accept him as her family.
However, her reason wasn't because of malice, but because she didn't want to be a 'mere' sister.
Aiko was a shy and introverted girl since childhood, thus Ryan who became her only close friend was like a prince to her.
She already harbored affection to him since childhood, thus she didn't want their relationship to merely end up as brother and sister.
This affection was only increased since they live together.
Ryan who feels indebted to Aiko and her mother for sheltering him, tried hard to become perfect brother and son by being obedient and overprotective toward both of them.
He will aggressively beat up anyone who dares to bully Aiko in school and comply with any of her wishes since he feels that it was the least he could do in order to repay their kindness.
Though unbeknown to Ryan, his overprotective nature only serve to increased Aiko's affection level toward him.
Not to mention lately Aiko's 'affection' start to steer in a 'strange' direction.
Maybe because of her hormones that start to awaken, Aiko became more conscious toward Ryan.
Even though earlier she teased him for having 'little sister' fetish, actually it was the opposite, she was the one who had 'older brother' fetish.
It was a known fact that girls will have earlier maturity compared to the boys.
This fact also applied to Aiko, thus she can't help but had some 'lewd' thought toward her target of affection.
As time passed she can no longer suppress this thought since her target of affection was living together with her.
Thus in order to relieve her 'heat', Aiko needs to vent it to something. That was when she proposed to Ryan to had her became the one in charge of laundry.
She gave him a reason that since she was a girl she should start to increased her feminine level by learning cooking and washing laundry, thus made Ryan relent to her wish, not to mention washing laundry wasn't that difficult since they used a washing machine.
This was the prelude to the beginning of Aiko's adventures in the 'unknown and shady' territory.
She will start the day by rummaging Ryan's room to search his dirty laundry to wash them with Ryan's consent.
It was impeccable and justify act that deserves praise, at least until she brought them to the washroom.
In the washroom, she had indeed washed Ryan's laundry, but not before she relieved her doses of 'Ryanium' by sniffing them a couple of times.
It was a shameless act that enough to made those experienced non-virgin to blush in shame.
It was because of this act that one day, Aiko noticed some 'stain spot' in Ryan's underpants.
Usually, when she checks Ryan's room to take his dirty laundry, she will also clean them up if there were some untidy or dirty things, like in his desk or his bed.
It was below his bed that she accidentally found his underpants there when she tried to took his laundry.
She took it without thinking or checking it since maybe he accidentally drops there when he changed clothes.
Thus, like any other day, Aiko will start to do the laundry by performing her 'ritual'.
Though on that day, Aiko found a revelation when she sniffs his underpants, the particular one that originally located below Ryan's bed.
Unlike the usual, the smell was a bit different, thus prompting her to check the underpants with more detail.
Just like that, Aiko finally found out that day that her childhood friend starts his journey as a man.
Of course, Aiko knows that it was a normal occurrence, in fact, it was quite a late occurrence, especially since in her knowledge man will have their first ejaculation at 15 years old at the latest.
When Aiko thought about that event she can't help but blush with shame.
After all, at that time she accidentally sniffs that 'stain' at his underpants.
'Ugh, ever since that time I already know that I can no longer be a bride. No matter what, onii-chan must take responsibility. I'm sure mom will also agree with me since she also found out about my habit'
Remembering her shameful habit in the past and the fact that her mother found out about it made Aiko want to bury her head.
Since she can't stand to be the only one that feels shameful, then she will drag Ryan to take responsibility by unveiling his dark past.
"There was no way I can trust you. Not after I found out that your laundry in your room had an indecent stain when I try to wash them. Well, I'll not blame you since you're already at that age I guess. But you can't attack me or mom okay! It will become morally problematic otherwise. (though I guess it will not break the law since we're not blood relative)", said Aiko accusingly, while she murmuring her wishful thinking at the end of her sentences in a very low voice.
"Alright young miss, you win, so please don't tell this to mom. It was enough for my dignity to break in front of my sister, I don't want the same to happen in front of mom. I'll buy you the most expensive ice cream in the convenience store, okay…", said Ryan pleadingly.
"*giggle*, your wish will be granted. This is why I love you, nii-san", said Aiko with cheerful voice.
After saying that, Aiko can't help but hurriedly walk away faster in front of Ryan, thus made him unable to saw her bashful expression.
'Kyaaa~, I manage to say I love you to onii-chan', Aiko thought bashfully, while her face was brimming with happiness.
This day was like any other day, without any extraordinary event in particular. But even then, it was still the most blissful life for her since she can live an ordinary but happy life with Ryan and her mother.
She truly wishes that this kind of life will stay like this forever, though her wish for this kind of ordinary life will not be granted since mana cataclysm will happen in 3 years.