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?!
Now this is strange.
.أمّا هذا فهو غريب
Huch … Wie seltsam. Ich kann dich nicht
sehen, höre aber trotzdem deine Stimme.
Esto sí que es raro.
Oh, comme c’est bizarre !
Je ne te vois pas, mais j’entends ta voix.
Oh, questo sì che è strano.
Sento la tua voce ma non riesco a vederti!
Nossa, que misterioso.
Сато не видно, но я слышу её голос.
 Удивительно!