「檸檬が(れもんが)黄金の(おうごんの)爆弾(ばくだん)で、高級な(こうきゅうな)丸善が(まるぜんが)大爆発(だいばくはつ)したら面白い(おもしろい)」という空想

And then, the young man gently placed the single purchased 'lemon' on the top of the completed castle of books. He fantasized, 'What if this lemon were a terrifying golden bomb? It would be interesting if Maruzen were blown to smithereens,' and left the shop with a bounding heart like a child whose prank succeeded. An immortal monument in modern literary history, laughing off melancholy with a vivid artistic prank.