Kotaki Kyodai to Shikuhakku S01E12 - 'Aibetsu Tori'

Sacchan (Kyoko Yoshine) has decided to quit the coffee shop Shabadaba to help her mother's inn. The Kotaki brothers can't hide their turmoil in her sudden farewell to her sister. The 'Kanji Furutachi 1 Night 2 Day Tour' was proposed by 2nd Road (Kenichi Takitō) with the 1st Road (Kanji Furutachi) dropping his shoulders! ?? It's a rush to make a surprising proposal, but Satchan agrees! The first and last day spent with brothers and sisters under one roof. Finally the final episode!
Will the brothers tell Sacchan the truth? Furthermore, is the rental brothers father in danger of dissolution?