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".
We're going to have a water gun 
survival welcome party game!
Wir veranstalten eine Wasserpistolen-
Survival-Game-Party!
¡Demos inicio al juego de supervivencia
con pistolas de agua!
¡Demos inicio al juego de supervivencia
con pistolas de agua!
On va pouvoir commencer
notre bataille de pistolets à eau.
E ora giocheremo a un gioco 
di sopravvivenza con le pistole ad acqua!
Vamos ter uma festa de boas-vindas com um
jogo de sobrevivência de pistolas de água!