Drummer Ishii Yuya posted on Twitter before that he was featured in the Yamiyo ni Mau Aoi Tori PV & he also participated in the drums recording of the song as well
And Ishii Yuya once again wrote that he also took part in the drums recordings of BROKEN & Milky Way
https://twitter.com/ishiiyuya_drums/...28761777541120
Weird that Ishii Yuya doesn't have any drum recording credits for Atarashii Sekai e Atarashii Jidai e -Single Version- , perhaps for that the guys' longtime backup drummer MAKOTO did so ?