One day, Tsuna receives an invitation to a wedding ceremony. The names of the bride and the groom are Bianchi and Reborn! It seems that Nana found her wedding pictures the other day, which made Bianchi crazy about getting married. At first, Tsuna is sure that Reborn would never consent, but when he sees Bianchi in a wedding dress at the church he realizes the ceremony is real. Tsuna goes to the groom's room to congratulate Reborn, but he learns the surprising truth from Dino!