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".
I get to be in the pool 
with Hanabi-oneechan.
Ich werde mit Hanabi-oneechan im Pool schwimmen …
Hanabi en la piscina.
Hanabi en la piscina.
– Cool !
– La piscine avec Hanabi…
Potrò stare in piscina con la sorellona Hanabi.
Preciso entrar na piscina
com a Hanabi-oneechan.