Imagination

Sway heat-haze, start-sliding sweat

陽炎 (heat haze) is the wavy distortion you see rising from hot summer pavement — a signature image of Japanese summer poetry, sports anime, and everything that wants to feel sweaty and bright at once.

Echo-each-other voices, slap-each-other shoulders

Verb stem + あう ('do mutually') gives reciprocal verbs: 響きあう, 叩きあう. The hand-on-shoulder slapping is the iconic team-sports image — male sports culture in two strokes.

Opened window from, sky to asked

We this summer how-is, hey Mr. Future

〜なんだい is a masculine question ending — softer than 〜だ but still casual/rough. Common in 'old buddy' speech and shounen anime. 'Mr. Future' personifies the unknown season ahead.

Oh come on come on come on, connect

繋ぐ ('to connect') is the Haikyuu-friendly verb for 'keep the rally going' — passing the ball one more time, refusing to let it die. Iconic for the show.

Anytime anyone, there at want-to-stand-and

〜くって is a casual, slightly emphatic version of the te-form 〜くて (used with adjectives and 〜たい): 立ちたくって = 立ちたくて. Adds emotional double-take, common in shouted lyrics.

Mistake, get-irritated, struggle-continue

もがく = 'to struggle, thrash about' — like a fish out of water. Pairs naturally with 苦しむ ('suffer'), 焦る ('be panicked'), 暴れる ('thrash'). Stronger than 頑張る.

Never give up, this-as-is end-want as-for not

終わりたくはない uses the emphatic は ('as for ending — no'): stronger than 終わりたくない. The は inserts a contrast: 'whatever else, I don't want it to END (like this)'.

This imagination (object) carrying, I (topic) go (assertion)

抱える = 'to hold something cumbersome / carry on one's back'. Used both literally (抱える荷物) and emotionally (不安を抱える 'carry anxieties'). The imagination here is something you bear forward like a heavy bag.

Textbook in exists answer than, more

Knocked-flying emotion (object) was-wanting

ぶっ〜 is a slangy intensifier prefix from ぶつ ('to hit'). ぶっ飛ぶ = 'to be blown away'; ぶっ飛んだ感動 = 'knock-you-flat emotion'. Other examples: ぶっ壊す ('smash to bits'), ぶっちぎり ('absolute lead').

Welling-up come, GWAAH (quote) something (subject)

グワァー is a mimetic noise (giseigo) — the sound of a sudden surge or roar. Putting って after it makes the noise itself the descriptor: 'a GWAAH-style something'. Quintessentially shounen energy.

Oh hello hello hello, answer

Collide-and, roll-and, strong become-want-and

Stubbornness-stretch-and stand-up-and, repeat but

意地を張る ('to stretch one's pride') means 'to be stubborn out of pride / dig your heels in'. Often disapproving ('don't be so stubborn'), but in sports lyrics it's celebrated.

Lost time from, next (subject) has-started

始まってんだ contracts 始まっているんだ ('the thing is, it has started'). Common in male spoken speech, lyrics, and motivational anime monologues.

Now (topic) bitter astringent taste even, baby someday surely

苦い (bitter, like coffee) and 渋い (astringent, like green tea or unripe persimmons) cover two distinct unpleasant tastes. Pairing them = 'an emotionally rough flavor that's not just one kind of bad'.

Anytime anyone, there at want-to-stand-and

〜くって is a casual, slightly emphatic version of the te-form 〜くて (used with adjectives and 〜たい): 立ちたくって = 立ちたくて. Adds emotional double-take, common in shouted lyrics.

Mistake, get-irritated, struggle-continue

もがく = 'to struggle, thrash about' — like a fish out of water. Pairs naturally with 苦しむ ('suffer'), 焦る ('be panicked'), 暴れる ('thrash'). Stronger than 頑張る.

Never give up, this-as-is end-want as-for not

終わりたくはない uses the emphatic は ('as for ending — no'): stronger than 終わりたくない. The は inserts a contrast: 'whatever else, I don't want it to END (like this)'.

This imagination (object) carrying, I (topic) go (assertion)

抱える = 'to hold something cumbersome / carry on one's back'. Used both literally (抱える荷物) and emotionally (不安を抱える 'carry anxieties'). The imagination here is something you bear forward like a heavy bag.

Oh come on come on come on, slight even chance

わずかでも = 'even a tiny amount of'. Standard sports/never-give-up phrasing — taking even a slim chance and running with it.

That time, can-believe everything was, Mr. Future

信じれる is the colloquial 'ら抜き' (ra-dropped) potential form of 信じる — proper Japanese is 信じられる. Common in casual speech; technically incorrect but very widespread.

Oh hello hello hello, can-hear-am (question)

〜かい is a casual masculine question particle, gentler than 〜だ but still distinctly old-school male. Common in older men's speech and shounen anime.

Never give up, this-as-is let-run give

走らせてくれ ('let me run') is a causative + くれる ('do for me'). Standard 'permit me' construction: 行かせてくれ ('let me go'), 飲ませてくれ ('let me drink'). The よ caps it with insistence.

This imagination's beyond toward, I (topic) go (assertion)

イマジネーションの先 ('the place beyond imagination') is the song's signature image: pushing past what you could even picture being possible.