"This QUELL's song. Our song."

Izumi Shu, who once worked as part of a national idol unit, has been  busy lately promoting the drama he's starring in. Meanwhile, in order to catch up to their leader, Horimiya Eichi, Kuga Issei, and Kuga Ichiru, the other members of QUELL, devote themselves to their work and lessons.
I doubt it'll be easy,
،أشكّ بسهولة الأمر
Dudo que sea fácil,
Dudo que sea fácil,
C’est plus facile à dire qu’à faire,
Dubito che sarà facile,
Duvido que seja fácil,
Сомневаюсь, что это будет легко,