Deeper is the second full-length studio album by Japanese rock band Hitorie. It was released on February 24, 2016, and followed by the album IKI, released ten months later. It includes one-Me two-Hearts as the lead single, which was used as the opening theme to the anime adaptation of Divine Gate.
The album's cover art is from an art exhibition called "STILLSCAPE", created by photographers Tetsuya Nagato, who frequently works on the band's product artwork, and Taro Mizutani.
The album's release tour, one-Me tour "DEEP/SEEK" started in March of that year over 14 locations nationwide. The tour final, at the Shinkiba Studio Coast, was released as a live movie and album on August 8.
wowaka started production on the album without a clear concept or title. After listening to the final songs, he chose the title as he feels he's created something "deeper" than before. The first track's title, GO BACK TO VENUSFORT, is a reference to the shopping mall Venus Fort, in Odaiba, Tokyo. The lead single's title, one-Me two-Hearts, is a double entendre, as it can be read both as "One Me Two Hearts", and "One Meets Her".