Maybe my gut feeling tells me the plant is going to be gone soon, and thankfully I DID take a photo last Saturday. This week, I went to work as usual. I don't remember, was it a Monday or Tuesday, but the other half of the plant has been dug out. No more flowers.
Yesterday, on my way home, I passed by the "empty" styrofoam box and decided to take another peek. Ok the plant is gone, but in its place are some new bulbs. I can't tell what kind of plant it is. So I'll wait for a few weeks/months and see what's that. :)