After the failure I♥B experienced in their latest live performance, they've dedicated themselves to practicing. When a senior IChu unit, Lancelot, appears before them, I♥B performs a song perfectly at their request, but the word that comes out of Issei's mouth is one they never expected.
Ring out! To the sky
فلنغنّي! نحو السماء
Lasst sie bis in den Himmel erschallen!
Risuona! Fino al cielo
Faça ressoar pelos céus
Звук разнесётся по небу.