Happy days

 is a best album by Ray. It was her final release before retirement.

CD

 * 1) sign
 * 2) Rakuen PROJECT (楽園PROJECT)
 * 3) Recall
 * 4) lull ~Soshite Bokura wa~ (lull 〜そして僕らは〜)
 * 5) ebb and flow
 * 6) secret arms
 * 7) Hajimete Girls! (初めてガールズ!)
 * 8) a-gain
 * 9) ♡km/h
 * 10) Kokuhaku (告白)
 * 11) 凪-nagi-
 * 12) Kisetsu no Shutter (季節のシャッター)
 * 13) Kimi to Ita Sora (君といた空)
 * 14) ♡Koyubihime♡ (♡こゆび姫♡)
 * 15) Marine Snow (マリンスノー)

Limited Edition CD2

 * 1) Over Ride
 * 2) Hikari (ひかり)
 * 3) babymacaron
 * 4) As for me
 * 5) Chigiri - Kono Hiroi Hiroi, Jikuu wo Koete (契-この広い広い、時空を越えて)
 * 6) Hajimari no Asa (始まりの朝)
 * 7) Yawajanai DID!! -Catch me To LOVE-ru- (やわじゃないDID!!-Catch me To LOVEる-)
 * 8) a-ha・・・!
 * 9) I'm MONSTER-chan (I'm MONSTERちゃん)
 * 10) fragment love
 * 11) Lovely storm
 * 12) Hoshi (星)
 * 13) Confession
 * 14) My Future
 * 15) Yakusoku train (約束train)
 * 16) Kimi to (キミと)

Limited Edition Blu-ray

 * 1) "sign" MV
 * 2) "Rakuen PROJECT" MV
 * 3) "Recall" MV
 * 4) "As for me" MV
 * 5) "lull ~Soshite Bokura wa~" MV
 * 6) "ebb and flow" MV
 * 7) "Yawajanai DID!! -Catch me To LOVE-ru-" MV
 * 8) "secret arms" MV
 * 9) "Hajimete Girls!" MV
 * 10) "a-gain" MV
 * 11) "♡km/h" MV
 * 12) ANIMAX MUSIX 2016 YOKOHAMA(2016.11.23@横浜アリーナ)より
 * 13) ♡km/h
 * 14) Hajimete Girls!