仮面の男の正体は、ガンプラバトル全米選手権の決勝でタクマに敗れたマハラだった。ミサの加勢により危機を脱したリュウセイ達は、マハラが生み出した特殊ＡＩキャラが操るガンプラに全力で立ち向かう。
The identity of the masked man is revealed to be Mahara, who was defeated by Takuma in the final round of the Gunpla Battle U.S. Championship. With Misa's assistance, Ryusei and the others escape their predicament, then do their utmost to confront Gunpla controlled by the special AI characters that Mahara has created.
