Kessoku Band has their first song and they're ready to play their next concert, but Seika isn't so easily convinced.
and that I don't have any regrets.
وألّا أتحسّر على شيء
pour ne pas avoir de regrets.
e di non avere alcun rimpianto.
e que não me arrependo de nada.
что выжала из себя максимум.