I think the implication is that the tour group just left the zoo that contains this petting area, and had they stayed long enough for the rabbit area to open, they would have been there.
The petting zoo opens right now...! That too is fortune from misfortune, right...And at that time Hotaru reached the point when too much good luck made her anxious and restless.Rabbit petting zooPetting time
Weekdays
xx:00 - 15:xx
Holidays
xx:00 - 16:xxHa...Haa...I'm so unlucky... But, I had to walk less than I expected, so it was a little bit of fortune in misfortune
... I guess?Ah... Mr Pro- ducer, please look.*flustered*The bus broke down and I had to walk the rest by myself...Y...You think so?
Cinderella Girls Theater
劇場第571『ラッキーでオロオロ』
Theater Episode 571 - Lucky, yet flusteredUp till a moment ago, we had a big tour group here, but, you see—The rabbits are in a great mood today, so you're even luckier, you know!They just left, so the rabbits are all yours! You're lucky, aren't you, Miss