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?!
Then next time, you should 
come stay at my place, Yacchan.
في المرّة القادمة، عليك المجيء
.للمبيت في منزلي يا ياتشان
Entonces ven otro día
a mi casa, Yacchan.
E allora, Yacchan, la prossima volta
vieni a dormire da me!
Então da próxima vez, você deveria
dormir lá em casa, Yacchan.