<s>
is	O
a	O
Japanese	O
adult	B-Application
social	O
simulation	O
game	O
developed	O
by	O
Tactics	O
,	O
a	O
brand	O
of	O
Nexton	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
May	O
23	O
,	O
1997	O
for	O
Windows	B-Application
PCs	I-Application
,	O
the	O
same	O
day	O
as	O
To	B-Application
Heart	I-Application
by	O
Leaf	O
.	O
</s>
<s>
The	O
gameplay	O
in	O
Dōsei	B-Application
follows	O
a	O
branching	O
plot	O
line	O
which	O
offers	O
pre-determined	O
scenarios	O
with	O
courses	O
of	O
interaction	O
,	O
and	O
focuses	O
on	O
the	O
appeal	O
of	O
the	O
sole	O
female	O
main	O
character	O
Manami	O
Minase	O
.	O
</s>
<s>
Dōsei	B-Application
was	O
re-released	O
on	O
September	O
14	O
,	O
2000	O
,	O
with	O
the	O
title	O
Dōsei	B-Application
Memorial	O
Selection	O
.	O
</s>
<s>
The	O
game	O
's	O
original	O
soundtrack	O
was	O
released	O
bundled	O
with	O
Moon	B-Application
soundtrack	O
in	O
August	O
2000	O
at	O
Comiket	O
58	O
.	O
</s>
<s>
Dōsei	B-Application
is	O
a	O
romance	O
social	O
simulation	O
game	O
in	O
which	O
the	O
player	O
assumes	O
the	O
role	O
of	O
Masaki	O
Yamada	O
.	O
</s>
<s>
Dōsei	B-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
a	O
specific	O
direction	O
.	O
</s>
<s>
Dōsei	B-Application
was	O
Tactics	O
's	O
first	O
game	O
.	O
</s>
<s>
The	O
music	O
in	O
the	O
game	O
was	O
mainly	O
composed	B-Application
by	O
Shinji	O
Orito	O
who	O
had	O
at	O
the	O
time	O
moved	O
to	O
Tactics	O
after	O
working	O
under	O
Leaf	O
for	O
three	O
games	O
.	O
</s>
<s>
Three	O
others	O
—	O
Myū	O
,	O
Paste	O
,	O
and	O
Ishisan	O
—	O
also	O
helped	O
with	O
the	O
music	O
,	O
but	O
between	O
them	O
only	O
composed	B-Application
one	O
third	O
of	O
the	O
game	O
's	O
soundtrack	O
.	O
</s>
<s>
Dōsei	B-Application
was	O
first	O
released	O
in	O
Japan	O
on	O
May	O
23	O
,	O
1997	O
as	O
a	O
CD-ROM	B-Device
playable	O
on	O
a	O
Windows	B-Application
95	I-Application
PC	B-Device
.	O
</s>
<s>
The	O
release	O
date	O
was	O
coincidentally	O
the	O
same	O
day	O
Leaf	O
released	O
their	O
visual	O
novel	O
To	B-Application
Heart	I-Application
.	O
</s>
<s>
Nexton	O
,	O
the	O
publishing	O
company	O
Tactics	O
is	O
under	O
,	O
re-released	O
an	O
updated	O
version	O
of	O
Dōsei	B-Application
compatible	O
with	O
Windows	O
95/98	O
on	O
September	O
14	O
,	O
2000	O
under	O
the	O
title	O
Dōsei	B-Application
Memorial	O
Collection	O
.	O
</s>
<s>
DMM	O
released	O
Dōsei	B-Application
Memorial	O
Collection	O
as	O
a	O
downloadable	O
edition	O
compatible	O
with	O
Windows	B-Application
XP	I-Application
on	O
June	O
3	O
,	O
2011	O
.	O
</s>
<s>
The	O
game	O
's	O
soundtrack	O
was	O
released	O
bundled	O
with	O
the	O
soundtrack	O
for	O
Moon	B-Application
,	O
the	O
game	O
Tactics	O
made	O
after	O
Dōsei	B-Application
,	O
and	O
was	O
called	O
Dōsei	B-Application
and	O
Moon	B-Application
Original	O
Soundtracks	O
.	O
</s>
<s>
The	O
disc	O
contains	O
31	O
tracks	O
;	O
the	O
first	O
15	O
pertain	O
to	O
Dōsei	B-Application
and	O
the	O
latter	O
16	O
are	O
from	O
Moon	B-Application
.	I-Application
</s>
<s>
A	O
collection	O
of	O
trading	O
cards	O
featuring	O
art	O
from	O
Dōsei	B-Application
and	O
Moon	B-Application
were	O
also	O
released	O
.	O
</s>
