Introduced Name:- Kim Y/N Age:- 22 Princess of Eun kingdom. Fells love with timetraveler Name:- jeon jungkook Age:- 24 A popular scientist and a timetraveler. Fells in love with a princess Name:- cha eun woo Age:- 26 Jungkook best friend and also a scientist, mistakenly travels in past with jungkook. You can also call him a time traveler as well.