Ruri should stick to wine since she can't handle beer, but someone needs to take care of the leftovers if you make good beer batter.
Morina stayed in Sara's house while she worked at the family restaurant. This may have been the goal all along...
They even slept together. Yeah. Sara just wanted Morina to live with her for a while.
The Fest staff were anxious to bring Morina home. They came up with a menu that she could cook.