Osananajimi no Ijou Kawaii Imouto-chan - Vol. 2 Ch. 9 - Lil' Sis Resists

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Momo's diary's combination is 509, and Mizuki's diary's combo is, as we learned in chapter 1, 303. These are apparently each other's birthdays. Since we're dealing with a 3 digit combination lock with no punctuation the date format when we only knew Mizuki's combo was ambiguous and could represent either March 3 or March 30, depending on whether or not you read it as following a MDD or DDM format. However, there's no valid way to fit 509 into the DDM schema, which means that they must be using the MDD format, making Momo's birthday May 9.

We can therefore all rest easy knowing that these yuri sisters are -- to the extent permissible by the medium -- standards compliant with a truncated ISO 8601 date format.
 
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Momo's diary's combination is 509, and Mizuki's diary's combo is, as we learned in chapter 1, 303. These are apparently each other's birthdays. Since we're dealing with a 3 digit combination lock with no punctuation the date format when we only knew Mizuki's combo was ambiguous and could represent either March 3 or March 30, depending on whether or not you read it as following a MDD or DDM format. However, there's no valid way to fit 509 into the DDM schema, which means that they must be using the MDD format, making Momo's birthday May 9.

We can therefore all rest easy knowing that these yuri sisters are -- to the extent permissible by the medium -- standards compliant with a truncated ISO 8601 date format.
This raises the issue of how one would even use such locks for those born in October,November,and December.

Such tyrannical locks excluding one third of population,making it hard for people to put their loved ones' birthdays into them so others can hack into them,this shalt not stand!
 
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This raises the issue of how one would even use such locks for those born in October,November,and December.

Such tyrannical locks excluding one third of population,making it hard for people to put their loved ones' birthdays into them so others can hack into them,this shalt not stand!
You can actually fairly easily map the remaining three months onto the existing schema: October is easy, since the dials include 0, which you can use to denote 10. So you can just use the 001 through 031 range to indicate all October birthdays.

That only leaves November and December unaccounted for. But we've still got an out here: from October 1 to December 31 is 92 days, and we've got a range of 99 numbers (since any date of the format X00 is invalid) to work with. We can denote November and December dates using the existing digits on the dials by just counting up endlessly without resetting the first digit from when you flip from 930 (September 30) to 001 (October 1). Doing this will give us the following date mappings:

001 - 031 : October 1 - October 31
032 - 061 : November 1 - November 30
062 - 092 : December 1 - December 31

So for the November dates you subtract 31 to get the day of the month, and for the December dates you subtract 61.

Easy as pie! Best of all, if the target of your obsession finds out all the trouble you went to to encode their birthday into the 3-digit analog password input of your diary they'll be so impressed that they'll be putty in your hands!
 
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You can actually fairly easily map the remaining three months onto the existing schema: October is easy, since the dials include 0, which you can use to denote 10. So you can just use the 001 through 031 range to indicate all October birthdays.

That only leaves November and December unaccounted for. But we've still got an out here: from October 1 to December 31 is 92 days, and we've got a range of 99 numbers (since any date of the format X00 is invalid) to work with. We can denote November and December dates using the existing digits on the dials by just counting up endlessly without resetting the first digit from when you flip from 930 (September 30) to 001 (October 1). Doing this will give us the following date mappings:

001 - 031 : October 1 - October 31
032 - 061 : November 1 - November 30
062 - 092 : December 1 - December 31

So for the November dates you subtract 31 to get the day of the month, and for the December dates you subtract 61.

Easy as pie! Best of all, if the target of your obsession finds out all the trouble you went to to encode their birthday into the 3-digit analog password input of your diary they'll be so impressed that they'll be putty in your hands!
OKaXBK.gif
 
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Momo's diary's combination is 509, and Mizuki's diary's combo is, as we learned in chapter 1, 303. These are apparently each other's birthdays. Since we're dealing with a 3 digit combination lock with no punctuation the date format when we only knew Mizuki's combo was ambiguous and could represent either March 3 or March 30, depending on whether or not you read it as following a MDD or DDM format. However, there's no valid way to fit 509 into the DDM schema, which means that they must be using the MDD format, making Momo's birthday May 9.

We can therefore all rest easy knowing that these yuri sisters are -- to the extent permissible by the medium -- standards compliant with a truncated ISO 8601 date format.
The fuck is a date format? And what does ISO 8601 even mean?
 
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It's so difficult to tell, what direction this manga will go in the future but I'm certainly along for the ride to find out.
 
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The fuck is a date format? And what does ISO 8601 even mean?
ISO is the International Organization of Standards (abbreviating it to ISO instead of IOS appears to be for aesthetic reasons). It's an international organization which sets standards for a range of things.

ISO 8601 deals with how to write dates, a date format. Typically, in many parts of the world, you write the day then the month then the year and, principally in the US, in some places you write the month then the day then the year.

ISO 8601, however, specifies that you should write the year then the month then the day, ordering from most general to most specific. This is the way any date will be written by any ISO compliant organization so, despite this not being too common in lay usage, it appears in many contexts around the world.

No year is given on either of these locks, but months and dates are formatted to comply with ISO 8601 with the year part removed, hence the locks being compliant with a truncated ISO 8601.
 
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Yeah that dairy was full of unmentionables wasn't it? Big sis is really going to get the wrong picture of them two dating... which should actually help lil sis since big sis is into NTR. The issue is however if her target is her friend rather than lil sis, finalising the love triangle of Lil sis > big sis > best friend > lil sis.

Hey! Why are you holding an NTR magazine there?
She is getting NTR'd by her best friend, she wants to steal the little sister for herself, her best friend is into NTR. The series is all yuri NTR all the way down!

It is also a reference to Netsuzou Trap - NTR, a yuri NTR manga.
 

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