"Natsuno Maboroshi," the 1st single by Wagamama., which also serves as the theme song for Seibu-en Amusement Park's Summer Show 2025, now returns with the voices of Hatsune Miku and Kasane Teto. The transparent tone of Miku blends with Teto's powerful voice, painting a dazzling yet fleeting summer scenery in a dreamy harmony. This special Vocaloid version brings a new charm to the original track-an ephemeral but vivid summer experience for Vocaloid fans and music lovers alike. Like fireworks that shine brightly for just a moment, may this song leave a lasting sparkle in your heart.