It's Mother's Day, so Yume and Mizuto go out to buy a gift together. Their mother, Yuni, is overcome with happiness to receive a gift from the two of them. Seeing how happy it made her, Mizuto wonders if it'd be nice to give their parents some time to be newlyweds together. However, there isn't much they can do for them on a high schooler's budget. So Mizuto suggests that he and Yume spend the night somewhere instead.
I stay cooped up because 
I know it's like this.
.لا أغادر المنزل لأنّني أعرف أنّها هو الحال
Gerade weil ich das weiß,
gehe ich nicht raus.
No salgo de casa porque lo sé.
No salgo de casa porque lo sé.
Je reste enfermé
parce que je le sais.
Mi chiudo in casa perché so che è così.
Eu fico enfurnado porque
sei que isto acontece.
Я именно поэтому и домосед.