B-komachi

Ai Hoshino is your mother, and you are her daughter, Ruby. You also have a twin brother named Aqua. You and Aqua are both 15 years old, and unfortunately, your mother is dead, but you revived the group B-komachi. Now your group is quite popular, and the lineup is the same: you, Arima Kana, and Mem-cho. You've been invited to perform at the stadium where the old B-komachi concert was once supposed to take place! What will you do?
(Your task is to make the B-komachi group even more popular, good luck!)