Koharu gets frustrated by Hiyori trying to help her so much as she's fishing and Koi celebrates her sixteenth birthday.
Don't worry about it.
.لا تقلقي بشأن ذلك
Ach, du kannst nichts verkehrt machen.
No te preocupes.
C’est pas la peine.
Tranquilla, basta il pensiero.
Não precisa ter tanta consideração.