Here is scenario in which NC wins 73 additional games (98 total) but does not reach the postseason.

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
          Doosan	96	44	4	0.6857	0.0
             KIA	96	44	4	0.6857	0.0
              LG	96	44	4	0.6857	0.0
         Samsung	96	44	4	0.6857	0.0
             SSG	96	44	4	0.6857	0.0
              NC	98	45	1	0.6853	-0.5
          Kiwoom	49	95	0	0.3403	49.0
              KT	26	114	4	0.1857	70.0
           Lotte	26	114	4	0.1857	70.0
          Hanwha	26	117	1	0.1818	71.5

To construct the scenario, we start with the current standings:
            Team	W	L	D	GL	PCT	GB
             KIA	26	16	1	101	0.619	0.0
              NC	25	17	1	101	0.595	1.0
         Samsung	24	18	1	101	0.571	2.0
          Doosan	25	20	1	98	0.556	2.5
              LG	23	20	2	99	0.535	3.5
             SSG	23	20	1	100	0.535	3.5
          Kiwoom	18	24	0	102	0.429	8.0
              KT	18	25	1	100	0.419	8.5
          Hanwha	16	26	1	101	0.381	10.0
           Lotte	14	26	1	103	0.350	11.0

The next two tables show, respectively, how many of their remaining games each team wins and ties against each of the other teams in the scenario:

					Scenario Additional Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	10	10	10	10	11	13	6	1	0	71
Hanwha	0	-	0	0	10	0	0	0	0	0	10
KIA	0	11	-	12	10	0	14	12	3	8	70
Kiwoom	0	10	0	-	11	0	10	0	0	0	31
KT	0	0	0	0	-	0	8	0	0	0	8
LG	0	14	9	11	13	-	10	10	1	5	73
Lotte	0	12	0	0	0	0	-	0	0	0	12
NC	5	11	1	14	11	0	10	-	10	11	73
Samsung	6	13	8	11	14	9	11	0	-	0	72
SSG	13	10	0	13	10	4	12	0	11	-	73
-----------------------------------------------------------------------------------
Losses	24	91	28	71	89	24	88	28	26	24

					Scenario Additional Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	0	1	0	0	0	0	0	3	0	3
Hanwha	0	-	0	0	0	0	0	1	0	0	0
KIA	0	0	-	0	0	1	0	0	0	2	3
Kiwoom	0	0	0	-	0	0	0	0	0	0	0
KT	0	0	0	0	-	0	4	0	0	0	3
LG	0	0	1	0	0	-	0	0	1	2	2
Lotte	0	0	0	0	3	0	-	0	0	0	3
NC	0	0	0	0	0	0	0	-	0	0	0
Samsung	3	0	0	0	0	0	0	0	-	0	3
SSG	0	0	2	0	0	1	0	0	0	-	3
-----------------------------------------------------------------------------------
Total	3	0	3	0	3	2	3	0	3	3

The next two tables show, respectively, how many total games each team wins and ties against each of the other teams in the scenario:

					Scenario Total Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	14	12	15	15	15	14	9	2	0	96
Hanwha	2	-	1	2	13	1	1	1	1	4	26
KIA	3	15	-	16	13	4	16	14	5	10	96
Kiwoom	1	14	0	-	12	4	15	0	2	1	49
KT	1	3	3	4	-	1	9	3	0	2	26
LG	1	15	11	12	15	-	15	14	4	9	96
Lotte	2	15	0	1	3	1	-	1	2	1	26
NC	7	14	2	16	13	2	15	-	13	16	98
Samsung	11	15	11	14	16	11	14	3	-	1	96
SSG	16	12	4	15	14	5	15	0	15	-	96
-----------------------------------------------------------------------------------
Losses	44	117	44	95	114	44	114	45	44	44

					Scenario Total Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	0	1	0	0	0	0	0	3	0	4
Hanwha	0	-	0	0	0	0	0	1	0	0	1
KIA	0	0	-	0	0	1	0	0	0	2	4
Kiwoom	0	0	0	-	0	0	0	0	0	0	0
KT	0	0	0	0	-	0	4	0	0	0	4
LG	0	0	1	0	0	-	0	0	1	2	4
Lotte	0	0	0	0	3	0	-	0	0	0	4
NC	0	0	0	0	0	0	0	-	0	0	1
Samsung	3	0	0	0	0	0	0	0	-	0	4
SSG	0	0	2	0	0	1	0	0	0	-	4
-----------------------------------------------------------------------------------
Total	4	1	4	0	4	4	4	1	4	4