The Engagement of Marielle Clarac (Manga) Volume 8 by Haruka Momo

With only days left before her wedding, Marielle manages to evade her captors by careening down the river in an out-of-control boat. Simeon rescues his bride-to-be, though some very important objects are lost to the current: the rings! And not just their wedding rings, but also an exorbitantly expensive commission crafted for Duke Silvestre. Marielle feels compelled to apologize, so she, along with Simeon, Nigel, and Lutin, make their way to the duke’s seaside second home. However, when they arrive, the duke waves off the offer of monetary compensation—he would rather play a game with them. Just what kind of game does this knavish duke have in store?