This is the song sung by “Kiria” in the Shin Megami Tensei x Fire Emblem (幻影異聞録シャープエフイー) trailer that came out April 1st on the Nintendo Direct. (Video/song below for reference)
I found a transcript of the lyrics on 2ch written by Japanese users, so here they are in Romaji and translated!
The format:
Kanji
Romaji
English
kantopia 