<s>
is	O
a	O
Japanese	O
adult	B-Application
visual	O
novel	O
developed	O
and	O
published	O
by	O
Lump	O
of	O
Sugar	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
December	O
17	O
,	O
2010	O
for	O
Windows	B-Application
as	O
Lump	O
of	O
Sugar	O
's	O
sixth	O
title	O
.	O
</s>
<s>
In	O
April	O
2011	O
,	O
an	O
official	O
fan	O
book	O
was	O
published	O
by	O
Enterbrain	O
,	O
which	O
contained	O
a	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
four-panel	O
manga	O
titled	O
Lump	O
of	O
Comic	O
:	O
HGB	O
illustrated	O
by	O
Fumitake	O
Moekibara	O
who	O
also	O
provided	O
the	O
illustrations	O
and	O
character	O
designs	O
for	O
the	O
game	O
.	O
</s>
<s>
In	O
August	O
2011	O
,	O
a	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
drama	O
CD	O
was	O
produced	O
by	O
Marine	O
Entertainment	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
is	O
romance	O
visual	O
novel	O
in	O
which	O
the	O
player	O
assumes	O
the	O
role	O
of	O
Kaito	O
Toubu	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
follows	O
a	O
branching	O
plot	O
line	O
with	O
multiple	O
endings	O
,	O
and	O
depending	O
on	O
the	O
decisions	O
that	O
the	O
player	O
makes	O
during	O
the	O
game	O
,	O
the	O
plot	O
will	O
progress	O
in	O
alternative	O
directions	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
also	O
features	O
an	O
achievement	O
system	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
is	O
Lump	O
of	O
Sugar	O
's	O
sixth	O
game	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
music	O
was	O
composed	O
by	O
Shigenobu	O
Ōkawa	O
and	O
Yūta	O
Yamaguchi	O
.	O
</s>
<s>
The	O
full	O
,	O
adult	B-Application
game	O
was	O
released	O
on	O
December	O
17	O
,	O
2010	O
for	O
Windows	B-Application
as	O
a	O
limited	O
edition	O
version	O
.	O
</s>
<s>
Promotional	O
videos	O
were	O
released	O
commercially	O
,	O
with	O
four	O
different	O
versions	O
featuring	O
one	O
of	O
the	O
four	O
heroines	O
in	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
:	O
May	O
,	O
Suguri	O
,	O
Natsume	O
or	O
Koharu	O
.	O
</s>
<s>
The	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
characters	O
are	O
designed	O
to	O
give	O
the	O
appearance	O
of	O
chibis	O
in	O
the	O
comic	O
strips	O
.	O
</s>
<s>
The	O
opening	O
theme	O
for	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
is	O
by	O
Masami	O
Okui	O
,	O
with	O
lyrics	O
written	O
by	O
Trinity	O
,	O
and	O
arrangement	O
by	O
Macaroni	O
☆	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
contains	O
two	O
insert	O
songs	O
"	O
.	O
</s>
<s>
Merchandise	O
has	O
been	O
produced	O
for	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
,	O
including	O
figurines	O
produced	O
by	O
Volks	O
Inc.	O
,	O
special	O
stick	O
posters	O
,	O
rough	O
line	O
art	O
books	O
,	O
desktop	O
accessories	O
,	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
school	O
attire	O
cosplay	O
,	O
bed	O
sheets	O
,	O
pillow	O
cases	O
,	O
and	O
booklets	O
regarding	O
the	O
game	O
.	O
</s>
<s>
There	O
are	O
also	O
collectible	O
Lump	O
of	O
Sugar	O
trading	O
cards	O
that	O
depict	O
the	O
characters	O
from	O
their	O
existing	O
visual	O
novels	O
,	O
including	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
was	O
the	O
sixth	O
best	O
selling	O
visual	O
novel	O
in	O
2010	O
on	O
Getchu	O
,	O
and	O
was	O
the	O
number	O
one	O
best	O
selling	O
visual	O
novel	O
of	O
December	O
2010	O
sold	O
on	O
Getchu	O
.	O
</s>
<s>
Hello	B-Application
,	I-Application
Good-bye	I-Application
was	O
ranked	O
first	O
as	O
the	O
most	O
pre-ordered	O
visual	O
novel	O
game	O
in	O
Japan	O
in	O
November	O
2010	O
.	O
</s>
<s>
Getchu.com	O
awarded	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
first	O
place	O
for	O
the	O
visual	O
novel	O
with	O
the	O
best	O
quality	O
movie-making	O
in	O
2010	O
.	O
</s>
<s>
Moe	O
Game	O
Award	O
gave	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
silver	O
(	O
second	O
place	O
)	O
for	O
the	O
best	O
visual	O
novel	O
song	O
in	O
2011	O
,	O
which	O
was	O
"	O
Goodbye	O
Crisis	O
"	O
sung	O
by	O
Masami	O
Okui	O
,	O
losing	O
only	O
to	O
Grisaia	B-Application
no	I-Application
Kajitsu	I-Application
which	O
achieved	O
gold	O
.	O
</s>
<s>
On	O
Hello	B-Application
,	I-Application
Good-bye	I-Application
official	O
website	O
,	O
a	O
popularity	O
poll	O
was	O
held	O
for	O
the	O
characters	O
.	O
</s>
