第 6 集: Yuu在河邊為Sonoa舉辦水槍歡迎派對
2018年5月9日 播出
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". (Source: Crunchyroll)