けい セカイ系 LinksSentence search for セカイ系Sentence search for セカイけいSentence search for 世界系Sentence search for せかいけいKanji details for 系Edit in JMdict Noun1. sekai-kei (genre of manga, anime, etc.)Other forms世界系 【せかいけい】 Discussions Log in to talk about this word.