Sonoa gets drunk and ends up living at Tachibanakan. Yuu gets everyone to have a welcome party for Sonoa, so they meet by the riverside in appropriate outfits. Yuu has water guns waiting for them, and has everyone enter a "Water Gun Survival Game".
Oh, whatever. Prepare yourself!
Ach, egal. Macht euch gefasst!
¡Prepárense!
¡Preparaos!
Enfin bref, fais tes prières !
Ma ormai pace! Preparati!
Ah, tanto faz. Preparem-se!