His face lights up, and Nanami cannot help the smile that beams off his face. He slides the finger onto Yu's hand, stands, and pulls him close. It's much like the hug that first day, when they saw each other here, save this time Nanami kisses him in public and in full view of anyone going by. A proposal is an appropriate time for such affectionate gestures.
Re: 2/17 -- Proposal in Tides