{{Lyrics
| group         =[[Liz Triangle]]
| group_en      =
| titlejp       =
| titlerom      =
| titleen       =Regret of my heart 
| length        =05:00
| arranger      =kaztora
| lyricist      =Peko
| vocalist      =lily-an
| other_staff   =
| source        =
* original title: {{lang|ja|蠢々秋月　～}} Mooned Insect
* source: {{IN}}
| eng_only      =
| untranscribed =
| unromanized   =
| untranslated  =
| album1        ={{LyricAlbum|秋葉文化祭コンピレーションCD Vol.1|TTAB-0001.jpg}}
| album2        ={{LyricAlbum|GRAY|LTCD-0029.jpg}}
|extra_info     = 
| lang          =

|kan1=
思い出すよ
[悲しくて]
あなたの事
[寂しくて]
忘れないよ　いつでも　花びら舞い散る　キズ
疼くこんな夜　また…震えて
|kan2=
寢ぼけ眼　こすり起きて　これから　一人きりだと　気づくの
抱きしめて欲しいよ　近くへ行きたいよ　あなたがそこに居るなら
だけど
[蟲たちが囁いているのは]
気のせいとか　思い過ごしじゃ片付けられずに
[大きな花の傘も今では]
誰かを隠して　気づかない　フルして　泣いてる
|kan3=
蛍の光は　傷ついた　哀しいココロを照らしていく
仄かに浮かんだ　思い出は　一瞬　煌き
また　散っていくのかな
|kan4=
花が咲いて　また季節が　巡って　それも今では気にならない
「あなたが笑えて　しあわせならぼいい」と
言えたのは　嘘だったんだ
今更だね
[Regret of my heart]
馬鹿だよね
[いつも]
風に見えた幽かな香り
どれだけ経っても
[戻らないの]
漂っている
[だから]
瞼閉じ　逃げ出しても　まだ見えてしまう
|kan5=
蛍の光で　照らしてる　哀しいココロを慰めては
いつか受け入れる　強さへと　変えられるような日が
来るのを願うよ
|kan6=
桜が散って　向日葵が咲く
二人の時を重ねて
何が起きても　怖くなかったよ　まだ思い出せる
|kan7=
私達が見つめてた　未来は誰かと分けあっても
あの日の約束　それだけは　嘘じゃないと言って
|kan8=
蛍の光は　傷ついた　哀しいココロを照らしていく
仄かに浮かんだ　思い出は　一瞬　煌き
また　散っていくのでしょう
まだ…あなたを忘れられないから

|rom1=
omoidasu yo
[Kanashikute]
anata no koto
[Sabishikute]
wasurenai yo itsudemo hanabira maichiru kizu
uzuku konna yoru mata… furuete
|rom2=
nebokema kosuriokite korekara hitorikirida to kidzuku no
dakishimete hoshī yo chikaku e ikitai yo anata ga soko ni irunara
Dakedo
[mushitachi ga sasayaiteiru no wa]
kinosei toka omoisugoshi ja katadzukerarezu ni
[ōkina hana no kasa mo ima de wa]
dareka wo kakushite kidzukanai furishite naiteru
|rom3=
hotaru no hikari wa kizutsuita kanashī Kokoro o terashiteyuku
honoka ni ukanda omoide wa isshun kirameki
mata chitte iku no kana
|rom4=
hana ga saite mata kisetsu ga megutte sore mo ima dewa ki ni naranai
「anata ga waraete shiawase naraboī 」to
ieta no wa usodatta nda
imasarada ne
[Regret of my heart]
bakada yo ne
[itsumo]
kaze ni mieta kasukana kaori
dore dake tatte mo
[modoranai no]
tadayotte iru
[dakara]
mabuta toji nigedashitemo mada mieteshimau
|rom5=
hotaru no hikari de terashiteru kanashī kokoro o nagusamete wa
itsuka ukeireru tsuyosa e to kaerareru yōna hi ga
kuru no o negau yo
|rom6=
sakura ga chitte himawari ga saku
futari no toki o kasanete
nani ga okitemo kowakunakatta yo mada omoidaseru
|rom7=
watashitachi ga mitsume teta mirai wa dare ka to wakeatte mo
anohinoyakusoku soredake wa uso janai to itte
|rom8=
hotaru no hikari wa kizutsuita kanashī Kokoro o terashiteyuku
honoka ni ukanda omoide wa isshun kirameki
mata chitteyuku nodeshou
mada… anata o wasurerarenai kara

|eng1=
I'm thinking
[sadly]
about you
[forlornly]
I'll never forget the dancing petals, and the hurt
Aches tonight, making me tremble again
|eng2=
Rubbing my half-asleep eyes I realise I will be alone from now on
I want to embrace you, to go closer to you, if only you were there
However
[What the insects are whispering of]
Thinking about it in my imagination without acting on it resolves nothing
[Even now, the umbrella of the large blossoms]
Conceals someone pretending not to notice they're crying
|eng3=
The light of the firefiles shines on my hurt, sorrowful heart
Faintly, the floating memories sparkle for a moment
Will they fall again?
|eng4=
The season of blooming flowers comes again, but as I am now I pay even that no heed
"I want you to smile and be happy"
Was that a lie?
Even though it's been this long
[Regret of my heart]
I'm such a fool
[always]
The faint scents I sensed in the wind
No matter how many pass on by
[you won't come back]
Drifting through the air
[that's why]
Even if I close my eyes and run away from it, I can't help but see you
|eng5=
Soothing the sorrow in my heart, the light of the firefiles shines on me
And in time, I hope the day will come when it becomes
The strength to accept
|eng6=
The cherry blossoms fall, the sunflowers bloom
And once again I'm reminded of the time we spent together
Whatever happened, I wasn't afraid back then-that I still remember
|eng7=
Even though the future we gazed at together has been split apart
Tell me at least the promise we made that day wasn't a lie
|eng8=
The light of the firefiles shines on my hurt, sorrowful heart
Faintly, the floating memories sparkle for a moment
And will surely fall again
Again... Because I won't let myself forget about you

| lyrics_source =Translated by [https://www.youtube.com/watch?v=XOZw_bYs_Ys Akyuun & Tewifying]
| notes         =
}}