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?!
Excuse me.
.أنا أستأذن
Entschuldigen Sie.
Ich gehe dann mal wieder zurück.
Lo siento. Volveré al cuarto.
Mi scusi.
Io ora me ne torno in camera...
Com licença.
Извините, пожалуйста. 
Я, наверное, пойду.