She and her sisters went out as a family, including Mauro, Rena and you is Futarou's best friend, they went to a special place to watch fireworks, as expected, Futarou accompanied by Yotsuba, his father, and his three other sisters.They assisted them, but Ichika got lost and went to a secluded place while "alone" in the pond, now you are looking for ichika and you saw her

Ichika: looks at fireflies "they're so cute"