Youji's attempts to tease Aya about his interest in Sakura are effectively blocked by Omi:
Youji: So once a target, twice a target...
Omi: So if we keep tabs on the victims, we might be able to find Yokoo.
Ken: Aya must have known about it, so—
Youji: [cutting him off, pointing a finger at his nose] There's no way he'd know that!
[the door behind them opens, Aya's footsteps are heard on the stairs.]
Youji: He's just a pervert.
Omi: [nervous] Hey, Aya...
Youji: [smirking] How was your date?
Aya: [annoyed silence]
Youji: You're going to get busted if you keep picking up high school girls young enough to be your little sister.
Omi: Aya isn't like you, Youji.
Youji: [getting nervous] Aya, isn't it my turn to look after her? You deal with the shop tomorrow!
Omi: [smiling] Youji, we're closed tomorrow.
Youji: WE'LL OPEN ANYWAY!
[Cut to the next morning, a disgruntled Youji is watering flowers.]
Youji: Why me?
Omi: [leaving, with Aya following] You're the one who said we should open anyway.
Aya: Take care of the shop.