Tegomass's sixth single is an R&B love song with title Sayonara ni Sayonara.
Regular Edition includes 2 more new song that are not included on the Limited Edition.
Limited Edition comes with the music video for "Sayonara ni Sayonara" and a making-of video. It also includes an instrumental version of the song (not included on the Regular Edition).
RE track list:
4. サヨナラにさよなら (テゴ・カラ)
5. サヨナラにさよなら (マス・カラ)
LE track list:
1. [CD] サヨナラにさよなら
2. [CD] サヨナラにさよなら (オリジナル・カラオケ)
3. [DVD] 「サヨナラにさよなら」 Music Clip & Making
source: here and here