『永遠契約』（エターナル・コントラクト）
An explosive J-pop idol anthem at 180 BPM, opening with blazing electric guitar riffs, infectious chiptune arpeggios, and propulsive pop-rock drums. Verses weave energetic synths, orchestral stabs, and a playful bassline, building to soaring, catchy choruses with uplifting key changes. Female soprano delivers dynamic, expressive lines—playful, confident, and shy—peppered with whispery, dramatic flourishes. The blend of rock drive, magical effects, and sparkling pop textures creates an electrifying, idol-worthy mix.
『永遠契約』（エターナル・コントラクト）
An explosive J-pop idol anthem at 180 BPM, opening with blazing electric guitar riffs, infectious chiptune arpeggios, and propulsive pop-rock drums. Verses weave energetic synths, orchestral stabs, and a playful bassline, building to soaring, catchy choruses with uplifting key changes. Female soprano delivers dynamic, expressive lines—playful, confident, and shy—peppered with whispery, dramatic flourishes. The blend of rock drive, magical effects, and sparkling pop textures creates an electrifying, idol-worthy mix.
Lyrics
――これは、封印された心を解き放つ、禁忌の契約。
闇に封じられた恋心が、勇者との出会いによって覚醒する。
運命を縛る鎖は、今や煌めく魔法の旋律へと変わり、
世界をも変える最終呪文（ラストスペル）が放たれる――！
真実のヒロインは誰だ？
契約は、もう後戻りできない。
♥️中二病系アイドル爆誕‼️
This is a forbidden contract that will free a sealed heart.
Love sealed in darkness is awakened by an encounter with the hero.
The chains that bind fate have now transformed into a sparkling magical melody,
and the final spell that will change the world will be unleashed!
Who will be the true heroine?
The contract can no longer be reversed.
♥️The birth of a chuunibyou idol!! ️
Intro／セリフ
「我が名は天上院ルナ！
闇に封じられし恋心、今ここに解放する…！」
---
Aメロ 1
封印してた心の魔導書
あなたと出逢って暴走モード
視線合えば 雷鳴が走る
これは…コンタクトの前兆…！
---
Bメロ 1
鼓動が ドクン、加速して
呪文じゃ抑えられない
ねぇどうしよう？
君が勇者になってよ！
---
サビ 1
契約恋歌 響け
この胸のインフィニティ
恋は禁断のアーティファクト
（なのに消せない）
君という光に
引き寄せられてくデスティニー
Eternal contract!
---
Aメロ 2
黒きアイパッチ外したら
乙女の本音がバレちゃうじゃない！
強がる声も震えてるの
闇のハートが溶けちゃう…
---
Bメロ 2
契約と恋慕が
境界線で交錯する
ああどうしよう？
ヒロインは私…だよね？
---
サビ 2
契約恋歌 高鳴れ
時空越えるエターナル
恋は禁忌のトリニティ
（でももう戻れない）
勇者の瞳が
私を救う唯一の魔法
Eternal contract!
---
ブリッジ／詠唱
「Invisible Connect, Activate!
この心臓は、君への道標…
No escape from destiny!」
---
ラスサビ
契約恋歌 永久に
君となら世界だって変える
恋はラストスペル
（解放せよ）
真実のヒロインは
…私だよ！
I am the True Heroine!
Eternal contract!
『English version』
Intro / Monologue
"My name is Luna Tenjouin!
The love sealed in darkness… I shall release it now!"
---
Verse 1
The grimoire of my sealed heart
Went into overdrive when I met you
When our eyes collide, a thunderbolt strikes
This is… the omen of our contact…!
---
Pre-Chorus 1
Heartbeat, thump, accelerating
No spell can ever hold it back
Hey, what should I do?
You must become my hero!
---
Chorus 1
Contract rhapsody, resound
Infinity within my chest
Love is the forbidden artifact
(And yet, I can’t erase it)
Drawn to the light called you
Pulled into my destiny
Eternal contract!
---
Verse 2
If I take off the black eyepatch
My maiden’s truth will be exposed!
Even my strong voice is trembling
The heart of darkness will melt away…
---
Pre-Chorus 2
Contract and yearning
Intersect at the borderline
Ah, what should I do?
The heroine is… me, right?
---
Chorus 2
Contract rhapsody, rise high
Eternal across time and space
Love is the trinity of taboos
(But I can never return)
The hero’s eyes
Are the one and only magic to save me
Eternal contract!
---
Bridge / Incantation
"Invisible Connect, Activate!
This beating heart is my guide to you…
No escape from destiny!"
---
Last Chorus
Contract rhapsody, forever
With you, I could change the world
Love is the final spell
(Unleash it now)
The true heroine is…
It’s me!
I am the True Heroine!
Eternal contract!