Season 1
Gainer lives in a Domepolis in Siberia. One day, he is unexpectedly taken to a detention center by the Siberian Railway Guards on suspicion of emigrant activity. There, Gainer meets a young man named Gain and leaves with him when he escapes. They break into a manor house and Gainer steals an Overman to fight back against the Railway Police who have caught up with them.
Episodes
1 Gain and Gainer Sep 7, 2002 
2 Repayment Sep 14, 2002 
3 Explosion! Overskill Sep 21, 2002 
4 The Taste of Victory is the Taste of a Kiss Sep 28, 2002 
5 Eyes Shining Toward Siberia Oct 5, 2002 
6 Saint Reagan's Assassin Oct 12, 2002 
7 The Railroad King, Kizz Munt Oct 19, 2002 
8 A Hellish Relay Race Oct 26, 2002 
9 A Hard Struggle! Adett, the Teacher Nov 2, 2002 
10 Asham's Tenacity Nov 9, 2002 
11 Tears Can't Be Stolen Nov 16, 2002 
12 An Attack Over Enormous Stone Columns Nov 30, 2002 
13 Brunhilde's Tears Dec 7, 2002 
14 The Apparition, Dominator Dec 14, 2002 
15 Between the Schedule and Magma Dec 21, 2002 
16 A Tough Fight, Adett Squad Jan 11, 2003 
17 A World Without Lies Jan 18, 2003 
18 The Sword's Fragility Jan 25, 2003 
19 Leonetta's Nightmare Feb 1, 2003 
20 Defeated at Katezu Feb 8, 2003 
21 Overman's Darkness Feb 15, 2003 
22 The Agato Crystal Feb 22, 2003 
23 Overdevil Revival Mar 1, 2003 
24 Overmax Mar 8, 2003 
25 Inside the Ice Mar 15, 2003 
26 Gain Over Mar 22, 2003