Kidou Shin Seiki Gundam X: Under the Moonlight

Taking place after the end of the war over Newtypes and D.O.M.E. in After War Gundam X, Under The Moonlight tells a new story of a boy, Rick Aller who finds a still-useable Gundam X, and his adventures while tracking down an AWOL friend, Kai, possessing the Gundam Belphagor.