S

 is the fourth album by Silent Siren.

Regulard/Limited Edition CD

 * 1) Cheribombu (チェリボム)
 * 2) Hachigatsu no yoru (八月の夜)
 * 3) milk boy
 * 4) Hapimari (ハピマリ)
 * 5) Love install
 * 6) hikari
 * 7) Yoshida san (吉田さん)
 * 8) Reira (レイラ)
 * 9) alarm
 * 10) nukumor
 * 11) C.A.F.E.
 * 12) Slow morning (スローモーニング)
 * 13) secret base ~kimi ga kura ta mono~ (secret base ～君がくれたもの～)

Limited Edition DVD

 * 1) Hapimari (ハピマリ) (Music Video)
 * 2) Hachigatsu no yoru (八月の夜) (Music Video)
 * 3) alarm (Music Video)
 * 4) Cheribombu (チェリボム) (Music Video)
 * 5) Documentary of Silent Siren Live Tour 2015 Spring→Summer Siren VS Silent in Taiwan & Hong Kong (documentary)
 * 6) Cheribombu (チェリボム) (Music Video Making)