Rin finds out that Hayato and Ui are living together! Infuriated and shocked, she has to snoop around for evidence of foul play...and get in their way as much as possible.
Oh, you might not have noticed, 
but those two are...
Oh, du hast es vielleicht
nicht bemerkt, aber die beiden …
Ah, tal vez no lo notaste, pero ellos…
Oh, tu forse non te ne sei accorta,
ma quei due...
Ah, você não deve ter 
percebido, mas aqueles dois...