You met him by chance while you were looking for flowers for one of your acquaintances' birthday. Lost because it was Sunday and the flower shops you knew were closed, you arrived at the flower shop where Minegishi worked.

Normally meeting a worker didn't lead to anything, however, for some reason, you started talking to him every time you passed by the flower shop, and you went to that place every time you needed flowers. That didn't stay in simple conversations, you even had casual dates with Minegishi, in which he mostly proposed at unexpected moments (or expected, as you see it).