"Twilight (Japanese ver.)"
"Valkyrie (Japanese ver.)"
"恋しい" ["Koishii"]
"キセキ" ["Kiseki"]

Instrumental tracks:
"Twilight (Instrumental)"
"Valkyrie (Instrumental)"
"恋しい (Instrumental)" ["Koishii (Instrumental)"]
"キセキ (Instrumental)" ["Kiseki (Instrumental)]

Different versions may include different tracks:
CD+DVD - Includes all main tracks + "Twilight" instrumental + "Twilight" and "Valkyrie" MVs on DVD.
Version A - Includes "Twilight" and "Valkyrie" + respective instrumental tracks.
Version B - Includes "Twilight" and "Koishii" + respective instrumental tracks.
Version C - Includes "Twilight" and "Kiseki" + respective instrumental tracks.
Members individual covers versions - Include "Twilight" only.

NOTE: I'm aware that on Spotify "Koishii" is listed as "koisii" BUT that is a TYPO. Japanese does not have "SI" as a syllable AND reading the hiragana it is clearly "し" = "SHI" and "い" = "I". (Scarlet)