: Rio introduces the group to a viral video of "Super Drummer BS," a powerful drummer known for "Dojo Yaburi"—challenging bands at rehearsal studios for their fees.
: A young man named Banri Shiroishi offers to join, but the group initially rejects him because he bluntly states his motive is making money to rebuild his family’s failing dairy farm. Argonavis from BanG Dream! Episode 3
: After witnessing Banri’s raw, powerful drumming in a battle at the Submariner café, the group is impressed by his talent. Ren's persistence and Banri’s eventual honesty lead to him joining as the final member. : Rio introduces the group to a viral
