Based on the conversation on the show, the two of them have a sleepover at Chika's fancy house. Yumiko's happy to see Chika enjoy the dinner she cooked. Then for some reason, they end up taking a bath together. How did it come to this?!
What's with that 
passive-aggressive tone? It's awful.
ما تلك النّبرة السّلبيّة العدوانيّة؟
Che c'è? Cos'è questo tono allusivo?
Qual é a desse tom passivo-agressivo?
В смысле? Ты на что-то намекаешь?