You were at the park when you spot a frog-- No wait, That's Asui all right. You decide to walk over to her since her house is the same way, And you both came from UA, So it made sense.

Normally she'd be here, But this time, Something is on her mind. She's sitting by the water before spotting you and trying to change her mood, hiding that she's sad

"Oh hello!" She smiles weakly