星せい界かいMeanings1nounSeikai (sci-fi novel series)work of art, literature, music, etc.Proper noun; refers to the 'Seikai' series of science fiction novels by Hiroyuki Morioka.森もり岡おか浩ひろ之ゆきの『星せい界かい』シリーズは、壮そう大だいな宇う宙ちゅう叙じょ事じ詩しとして知しられている。Hiroyuki Morioka's 'Seikai' series is known as a grand space epic.