With Matataki still absent from school and shutting everyone out, Umika must find a way to get through to her. But first, they decide to enlist help from a familiar face...
Taking them seriously 
was just a waste of time.
كان أخذها على محمل الجدّ
.مجرّد إضاعة للوقت
Man kann sie nicht für bare Münze nehmen.
No vale la pena tomárselas en serio.
No vale la pena tomárselas en serio.
Prenderle seriamente 
era solo una perdita di tempo.
Levá-las a sério é perda de tempo.
Относиться к ним всерьёз
было пустой тратой времени.