Rock'n Rouge Rock'n Rouge

In a sharply cool sports car...

グッと intensifies the impression: sharply, strongly, noticeably.

...he says, “Sorry to keep you waiting,” trying to look cool.

カッコつける means acting cool or trying to look stylish. It often has a slightly mocking edge.

With grease gleaming in his hair...

光らせて is causative: making the grease shine. The visual detail is a little flashy on purpose.

...he’s trying hard to nail the look, but it doesn’t quite work.

決めてる here means striking a pose or trying to look good. 絵にならない literally means "it doesn't become a picture," so it means it does not quite look right.

He says, “Let’s go to the sea.”

ぜ is a casual masculine-sounding sentence ending. The line is quoted from his side, not the speaker's.

He snaps his fingers, but...

けれど sets up a contrast: he looks smooth, but the next line will undercut it.

Your motives are impure, you know.

動機が不純 means his motives are impure or not innocent. だわ adds feminine emphasis.

You’ve got a whole dozen girlfriends.

1ダース is "one dozen." も intensifies the number: as many as a dozen.

You’re not as popular as the stories say, you know.

もてる means being popular in a romantic sense. ほどは means "to the extent that..."

I’d bet a million dollars on it.

〜ていい here is not permission but confidence: "I could even bet..."

When it comes to your address book, I’m the only one, right?

きり means "only / just." It is similar to だけ but often feels a bit more emphatic in this kind of line.

That hand you put around my shoulder...

The sentence isolates the hand first, then comments on it. That makes the gesture stand out.

...is a little too familiar.

慣れ慣れしい means overfamiliar, too casual, or too forward.

When I lightly pinched you...

〜たら gives a natural "when/if I did that..." sequence.

...you dropped your eyes, looking a little blue.

ブルー is the loanword sense of feeling down or gloomy.

Pure pure lips, my feelings say yes.

The English phrase makes the chorus feel glossy and slogan-like. 気持ちは YES states inner agreement directly.

Even if I say no to a kiss, it means the opposite.

と言っても means "even if one says..." The line itself is playful pop flirtation rather than realistic advice.

Pure pure lips, wait for me, please.

Again the chorus mixes English with Japanese for a polished pop sound.

In a petal-colored spring, I will fall in love.

花びら色 means petal-colored. It gives the spring image a soft pink tone.

When we walk along the breakwater...

防波堤 means breakwater or seawall, so the date scene becomes very concrete here.

...you lined up jokes and made me laugh.

笑わせる means making someone laugh. 並べて suggests joke after joke in sequence.

As if to avoid the wave of mood that rises when we fall silent...

黙りこむ means falling completely silent. 避けるように means "as if avoiding."

If you say you l-l-love me, don’t suddenly get tongue-tied.

Breaking 好き into ス・ス・スキ imitates stammering embarrassment.

Time is not running away, so whisper it more slowly.

時は逃げない means time is not running away. スローに is a katakana adverb meaning slowly.

Pure pure lips, my feelings say yes.

The chorus wording stays the same, but after the second verse it sounds a little less combative.

Even if I say no to a kiss, it means the opposite.

The grammar is unchanged; the important learner point is still と言っても.

Pure pure lips, wait for me, please.

The repeated English keeps the chorus sounding clean and catchy rather than conversational.

In a petal-colored spring, I will fall in love.

The song ends in the same spring-romance image it has been building all along.