Can such a happy 'sparkle' happen?

I was doing my daily single pull and got a rainbow animation...! I thought, 'Is Mao-kun coming?!' but it was a sparkle animation, so I wasn't expecting much... Then, the moment the dialogue appeared, I freaked out, and when I saw the silhouette... it was Rei-san, who I never got no matter how much I pulled!?!?!? Wait... is this really okay!? I used up all my luck for today, thank you so much (ㅅ´꒳` )