▁sends ▁Ak iko ▁falling ▁to ▁her ▁death ▁with ▁Acc el ▁unable ▁to ▁reach ▁her . ▁However ▁A oi ▁is ▁able ▁to ▁s ne ak ▁up ▁behind ▁him ▁una ware ▁and ▁sn atch es ▁the ▁Ga ia ▁Memory ▁En han cing ▁Ad apter ▁from ▁the ▁Up grad ed ▁Commander ▁D op ant , ▁throwing ▁it ▁to ▁Acc el . ▁The ▁Ga ia ▁Memory ▁En han cing ▁Ad apter ▁allows ▁him ▁to ▁transform ▁into ▁K amen ▁R ider ▁Acc el ▁Bo oster ▁and ▁save ▁Ak iko ▁before ▁defe ating ▁the ▁Commander ▁D op ant . ▁As ▁A oi ▁turns ▁herself ▁in , ▁with ▁Oh no ▁wanting ▁to ▁help ▁her ▁start ▁a ▁new ▁life ▁for ▁herself , ▁Ry u ▁and ▁Ak iko ▁begin ▁their ▁relationship ▁an ew . ▁ ▁K amen ▁R ider ▁E ternal ▁, ▁released ▁on ▁July ▁ 2 1 , ▁ 2 0 1 1 ▁( with ▁rent als ▁out ▁on ▁July ▁ 8 ), ▁is ▁primarily ▁a ▁flash back ▁story ▁set ▁after ▁the ▁events ▁of ▁K amen ▁R ider ▁W ▁Fore ver : ▁A ▁to ▁Z / The ▁Ga ia ▁Mem ories ▁of ▁F ate . ▁This ▁film ▁had ▁featured ▁several ▁actors ▁who ▁had ▁previously ▁worked ▁for ▁Super ▁Sent ai . ▁ ▁After ▁taking ▁out ▁a ▁S we ets ▁D op ant , ▁K amen ▁R ider ▁Double ▁enc oun ters ▁a ▁strange ▁woman ▁who ▁tries ▁to ▁kill ▁the ▁two - as - one ▁K amen ▁R ider ▁with ▁her ▁psych ic ▁powers ▁to ▁a ven ge ▁K ats umi ▁Da ido