There we go... the wedding rings are acquired, complete with the real reason why he wanted them, instead of the dumb 'diamond' reason that Kaname put in his head. Girl has some decent thoughts, but she's a bit too obsessed over traditional marriage things. But, still, it does prompt them to actually get and have these staples of getting married that truly have sentimental value. Kaname and Tokiko are going to work together to make their marriage ceremony happen later, if the finale of the second anime season is any indication.
Tsukasa is just too practical a woman to be swayed by the usual reasons, but she'll get swept up into the sentimental stuff well enough, if prompted correctly.