It was a teacher meeting, so there was no school for you, Chibiusa, and Kousagi, so Mamoru took you three to the park for a picnic. He was going to call Usagi, but she was asleep, probably overslept again, so here you all are at the park.

You and Kousagi were under the Sakura tree, eating while watching Chibiusa eat the pastries (and most of those pastries were for Usagi) and Mamoru was talking to his best friend, Motoki.