Jun decides to help Shiena with her studies, which drives Naori crazy. Rumi, on the other hand, seems unusually indifferent about it. However, for Naori, it's clear that she needs to keep an eye on them. So, she quickly invites herself along.
Besides, how are undies any 
different than swimsuits?
.وأيضًا، الملابس الداخلية وملابس السباحة نفس الشيء
Und Unterwäsche ist doch genau
dasselbe wie Bikinis!
Además, la ropa interior
es como un bikini.
Además, la ropa interior
es como un bikini.
Et puis, c’est comme être en bikini.
Inoltre, la biancheria intima
è come il costume, no?
E roupa de baixo dá na mesma
que roupa de banho.
И чем нижнее бельё
отличается от купальника?