Database

Database, also stylized as database, is the opening theme song for the first two seasons of the Log Horizon anime. It is performed by Man with a Mission, featuring TAKUMA from the band 10-Feet.

In one of Mamare Touno's 4chan Q&A sessions, he stated that the lyrics for database were written with the series' narrative direction in mind.

Lyrics
Lyrics are taken from The Lyric Wiki.