<s>
is	O
a	O
shoot	O
'	O
em	O
up	O
photography	O
game	O
,	O
and	O
is	O
the	O
12.5th	O
official	O
game	O
in	O
the	O
Touhou	B-Application
Project	I-Application
by	O
the	O
dōjin	O
circle	O
Team	O
Shanghai	O
Alice	O
.	O
</s>
<s>
In	O
English	O
speaking	O
circles	O
,	O
the	O
game	O
's	O
title	O
is	O
often	O
shortened	O
to	O
just	O
Double	B-Application
Spoiler	I-Application
,	O
and	O
abbreviated	O
to	O
DS	O
.	O
</s>
<s>
Double	B-Application
Spoiler	I-Application
inherited	O
the	O
system	O
of	O
its	O
predecessor	O
Shoot	B-Application
the	I-Application
Bullet	I-Application
,	O
where	O
the	O
player	O
cannot	O
shoot	O
projectiles	O
at	O
enemies	O
;	O
instead	O
,	O
the	O
main	O
character	O
must	O
shoot	O
photographs	O
to	O
clear	O
the	O
screen	O
of	O
bullets	O
and	O
take	O
down	O
bosses	O
.	O
</s>
<s>
New	O
to	O
Double	B-Application
Spoiler	I-Application
over	O
Shoot	B-Application
the	I-Application
Bullet	I-Application
is	O
the	O
option	O
to	O
change	O
the	O
orientation	O
of	O
the	O
shot	O
between	O
landscape	O
to	O
portrait	O
.	O
</s>
<s>
Aya	O
Shameimaru	O
:	O
One	O
of	O
the	O
main	O
characters	O
of	O
Double	B-Application
Spoiler	I-Application
and	O
boss	O
of	O
Level	O
Spoiler	O
.	O
</s>
<s>
Hatate	O
Himekaidou	O
:	O
Second	O
main	O
character	O
of	O
Double	B-Application
Spoiler	I-Application
and	O
boss	O
of	O
Level	O
Spoiler	O
.	O
</s>
