A FAMILY WEDDING! 
Sagiri turns the lives of everyone upside down with the sudden announcement of her engagement to a mysterious and handsome stranger. Her marriage to the second son of the powerful Yoinozoka family could make for a strategic alliance or a strategic blunder. Now, the all-powerful head of the family has the residents of Yuragi-sou right where he wants them!
Can they escape his clutches, and Sagiri a fatal love match? The girls might just need to hit the road via the power of dream-magic!