<s>
The	O
story	O
depicts	O
high	O
school	O
student	O
Kyosuke	O
Kosaka	O
who	O
discovers	O
that	O
his	O
standoffish	O
younger	O
sister	O
Kirino	O
is	O
actually	O
an	O
otaku	O
with	O
an	O
extensive	O
collection	O
of	O
moe	O
anime	O
and	O
younger	O
sister-themed	O
eroge	B-Application
she	O
has	O
been	O
collecting	O
in	O
secret	O
.	O
</s>
<s>
Bandai	O
Namco	O
Games	O
developed	O
three	O
visual	O
novel	O
video	O
games	O
from	O
2011	O
to	O
2013	O
for	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
and	O
PlayStation	B-Operating_System
3	I-Operating_System
consoles	O
.	O
</s>
<s>
To	O
Kyosuke	O
's	O
surprise	O
,	O
he	O
finds	O
a	O
hidden	O
eroge	B-Application
inside	O
the	O
case	O
and	O
he	O
soon	O
learns	O
that	O
both	O
the	O
DVD	O
and	O
the	O
game	O
belong	O
to	O
Kirino	O
.	O
</s>
<s>
That	O
night	O
,	O
Kirino	O
brings	O
Kyosuke	O
to	O
her	O
room	O
and	O
reveals	O
herself	O
to	O
be	O
an	O
otaku	O
with	O
an	O
extensive	O
collection	O
of	O
moe	O
anime	O
and	O
younger-sister-themed	O
eroge	B-Application
she	O
has	O
been	O
collecting	O
in	O
secret	O
.	O
</s>
<s>
Kyosuke	O
is	O
the	O
17	O
year-old	O
protagonist	O
of	O
Oreimo	B-Application
.	O
</s>
<s>
However	O
,	O
this	O
suddenly	O
changes	O
when	O
he	O
finds	O
one	O
of	O
her	O
eroge	B-Application
and	O
,	O
after	O
confronting	O
her	O
with	O
it	O
,	O
learns	O
that	O
she	O
is	O
an	O
otaku	O
.	O
</s>
<s>
In	O
the	O
Oreimo	B-Application
:	O
Kuroneko	O
spin-off	O
manga	O
,	O
the	O
two	O
wind	O
up	O
back	O
together	O
ten	O
years	O
later	O
as	O
an	O
alternate	O
ending	O
to	O
the	O
canonical	O
story	O
written	O
in	O
the	O
original	O
light	O
novels	O
.	O
</s>
<s>
She	O
is	O
secretly	O
an	O
otaku	O
with	O
an	O
obsession	O
for	O
"	O
little	O
sister	O
"	O
-themed	O
eroge	B-Application
,	O
as	O
well	O
as	O
the	O
children	O
's	O
anime	O
series	O
Stardust	O
Witch	O
Meruru.Despite	O
her	O
interests	O
,	O
she	O
states	O
she	O
does	O
not	O
know	O
why	O
she	O
started	O
liking	O
eroge	B-Application
and	O
denies	O
having	O
a	O
brother	O
complex	O
.	O
</s>
<s>
The	O
Oreimo	B-Application
:	O
Kuroneko	O
spin-off	O
manga	O
,	O
written	O
by	O
author	O
Tsukasa	O
Fushimi	O
,	O
sets	O
an	O
alternate	O
ending	O
to	O
the	O
original	O
canonical	O
story	O
.	O
</s>
<s>
She	O
also	O
believes	O
what	O
she	O
hears	O
on	O
the	O
news	O
,	O
thus	O
explaining	O
her	O
disapproval	O
of	O
anime	O
and	O
manga	O
,	O
calling	O
it	O
a	O
disgusting	O
hobby	O
,	O
especially	O
eroge	B-Application
,	O
due	O
to	O
the	O
media	O
's	O
portrayal	O
that	O
otaku	O
will	O
eventually	O
become	O
criminals	O
(	O
a	O
clear	O
reference	O
of	O
the	O
Tsutomu	O
Miyazaki	O
case	O
)	O
.	O
</s>
<s>
Similar	O
to	O
Kirino	O
,	O
she	O
has	O
an	O
obsession	O
with	O
eroge	B-Application
,	O
albeit	O
she	O
prefers	O
hardcore	O
yaoi	O
.	O
</s>
<s>
When	O
Kyosuke	O
challenges	O
him	O
,	O
he	O
allows	O
her	O
to	O
keep	O
everything	O
except	O
the	O
eroge	B-Application
,	O
although	O
Kyosuke	O
manages	O
to	O
protect	O
even	O
that	O
by	O
claiming	O
that	O
they	O
belong	O
to	O
him	O
.	O
</s>
<s>
He	O
claims	O
that	O
he	O
knows	O
best	O
of	O
what	O
is	O
going	O
on	O
in	O
the	O
family	O
and	O
he	O
has	O
always	O
known	O
that	O
the	O
eroge	B-Application
belonged	O
to	O
Kirino	O
,	O
despite	O
Kyosuke	O
's	O
effort	O
to	O
convince	O
him	O
otherwise	O
.	O
</s>
<s>
In	O
Ore	B-Application
no	I-Application
Imōto	I-Application
ga	I-Application
Konna	I-Application
ni	I-Application
Kawaii	I-Application
Wake	I-Application
ga	I-Application
Nai	I-Application
Portable	O
ga	O
Tsuzuku	O
Wake	O
ga	O
Nai	O
,	O
he	O
is	O
Kyosuke	O
's	O
uncle	O
.	O
</s>
<s>
In	O
Ore	B-Application
no	I-Application
Imōto	I-Application
ga	I-Application
Konna	I-Application
ni	I-Application
Kawaii	I-Application
Wake	I-Application
ga	I-Application
Nai	I-Application
Portable	O
ga	O
Tsuzuku	O
Wake	O
ga	O
Nai	O
,	O
she	O
is	O
Kyosuke	O
's	O
aunt	O
.	O
</s>
<s>
Kyosuke	O
's	O
classmate	O
who	O
,	O
similar	O
to	O
Kyosuke	O
,	O
often	O
has	O
to	O
support	O
his	O
little	O
sister	O
's	O
hobby	O
for	O
eroge	B-Application
.	O
</s>
<s>
He	O
is	O
also	O
into	O
little	O
sister-themed	O
eroge	B-Application
and	O
Kyosuke	O
first	O
meets	O
him	O
when	O
trying	O
to	O
borrow	O
a	O
bike	O
to	O
ride	O
home	O
following	O
a	O
midnight	O
eroge	B-Application
launch	O
.	O
</s>
<s>
Oreimo	B-Application
began	O
as	O
a	O
light	O
novel	O
series	O
written	O
by	O
Tsukasa	O
Fushimi	O
,	O
with	O
illustrations	O
provided	O
by	O
Hiro	O
Kanzaki	O
.	O
</s>
<s>
A	O
spin-off	O
manga	O
series	O
by	O
Airi	O
Mori	O
,	O
titled	O
Ore	B-Application
no	I-Application
Imōto	I-Application
ga	I-Application
Konnani	I-Application
Kawaii	I-Application
Wake	I-Application
ga	I-Application
Nai	I-Application
Kuroneko	O
If	O
began	O
serialization	O
in	O
Kadokawa	O
Shoten	O
's	O
Monthly	O
Shōnen	O
Ace	O
magazine	O
on	O
July	O
26	O
,	O
2021	O
.	O
</s>
<s>
The	O
stream	O
of	O
Oreimo	B-Application
returned	O
to	O
ANN	O
with	O
the	O
first	O
four	O
episodes	O
on	O
November	O
8	O
,	O
2010	O
.	O
</s>
<s>
A-1	O
Pictures	O
collaborated	O
with	O
Chiba	O
Urban	O
Monorail	O
to	O
promote	O
the	O
second	O
season	O
by	O
making	O
an	O
Oreimo-themed	O
monorail	O
train	O
,	O
which	O
remained	O
in	O
operation	O
until	O
September	O
30	O
,	O
2013	O
.	O
</s>
<s>
In	O
addition	O
to	O
their	O
own	O
series	O
,	O
the	O
characters	O
from	O
Oreimo	B-Application
also	O
make	O
cameo	O
appearances	O
in	O
the	O
episodes	O
of	O
the	O
anime	O
adaptation	O
of	O
Eromanga	O
Sensei	O
,	O
another	O
light	O
novel	O
series	O
written	O
by	O
Fushimi	O
and	O
illustrated	O
by	O
Kanzaki	O
.	O
</s>
<s>
A	O
PlayStation	B-Operating_System
Portable	I-Operating_System
visual	O
novel	O
titled	O
Ore	B-Application
no	I-Application
Imōto	I-Application
ga	I-Application
Konna	I-Application
ni	I-Application
Kawaii	I-Application
Wake	I-Application
ga	I-Application
Nai	I-Application
Portable	O
was	O
developed	O
by	O
Bandai	O
Namco	O
Games	O
and	O
released	O
on	O
January	O
27	O
,	O
2011	O
.	O
</s>
<s>
The	O
limited	O
edition	O
bundle	O
included	O
an	O
OAD	O
,	O
a	O
sister-talk	O
bonus	O
CD	O
,	O
and	O
an	O
additional	O
game	O
for	O
the	O
PSP	B-Operating_System
.	O
</s>
<s>
A	O
fighting	O
game	O
titled	O
based	O
on	O
the	O
fictional	O
game	O
in	O
the	O
series	O
,	O
was	O
released	O
by	O
Kadokawa	O
Contents	O
Gate	O
on	O
the	O
Yahoo	B-Application
!	I-Application
</s>
<s>
A	O
second	O
PSP	B-Operating_System
title	O
,	O
was	O
released	O
on	O
May	O
17	O
,	O
2012	O
.	O
</s>
<s>
The	O
opening	O
theme	O
of	O
the	O
second	O
PSP	B-Operating_System
game	O
is	O
"	O
Nexus	O
"	O
by	O
ClariS	O
.	O
</s>
<s>
A	O
PlayStation	B-Operating_System
3	I-Operating_System
game	O
,	O
was	O
released	O
on	O
September	O
26	O
,	O
2013	O
in	O
Japan	O
.	O
</s>
<s>
Kirino	O
also	O
makes	O
a	O
cameo	O
appearance	O
in	O
the	O
A	B-Application
Certain	I-Application
Magical	I-Application
Index	I-Application
PSP	B-Operating_System
game	O
,	O
being	O
another	O
game	O
based	O
on	O
a	O
light	O
novel	O
series	O
published	O
by	O
ASCII	O
Media	O
Works	O
.	O
</s>
<s>
Kirino	O
also	O
appears	O
as	O
a	O
playable	O
character	O
in	O
Dengeki	B-Application
Bunko	I-Application
:	I-Application
Fighting	I-Application
Climax	I-Application
,	O
with	O
Kuroneko	O
as	O
a	O
supporting	O
character	O
.	O
</s>
<s>
ANN	O
writer	O
Kim	O
Morrissy	O
cited	O
Oreimo	B-Application
as	O
the	O
series	O
that	O
revived	O
the	O
little	O
sister	O
boom	O
,	O
and	O
made	O
comparisons	O
to	O
Tsukasa	O
Fushimi	O
's	O
later	O
series	O
Eromanga	O
Sensei	O
.	O
</s>
<s>
Morrissy	O
stated	O
that	O
the	O
key	O
difference	O
between	O
the	O
two	O
,	O
despite	O
sharing	O
a	O
little	O
sister	O
moe	O
theme	O
,	O
is	O
that	O
Oreimo	B-Application
has	O
committed	O
the	O
ultimate	O
incest	O
taboo	O
due	O
to	O
Kyosuke	O
and	O
Kirino	O
being	O
related	O
by	O
blood	O
,	O
whereas	O
the	O
siblings	O
in	O
Eromanga	O
Sensei	O
lack	O
a	O
blood	O
relation	O
,	O
hence	O
"	O
allowing	O
the	O
romance	O
to	O
play	O
out	O
with	O
a	O
less	O
direct	O
connection	O
to	O
real-life	O
incest	O
"	O
.	O
</s>
