爾今の洋洋この蛍光にあり (Jikon no Youyou Kono Keikou ni Ari)

The Vastness Of The Hereafter Is Within The Light Of The Fireflies is a song sung by Iroha Nekomura and VY2. It is the one-hundred-and-twenty-fifth track in Other Vocaloid Songs 78: Over 20 New Vocaloids.