"What does this flower mean?"
"Er… The- the sun is always shining when I'm with you," she finally said. Her answer was what she really felt in that moment. To her, Sei was like the sunshine when the sky turned gray for her and she just wanted to tell him that. That was why she decided to defer from executing her original plan in the mean time.
Truth was that she bought the daffodil for her to use as a prop in executing the next step.
'Step #20; Pique his interest and leave him wondering'