Act 25: Tuxedo Mask's True Identity was Mamoru Chiba... (タキシード仮面の正体が地場衛だったなんて… / Takishiido Kamen no Shoutai ga Chiba Mamoru Datta Nante) 6:41 Banner reads: Farewell Party for Mamoru and Hina. 6:41 Top right poster reads They're off to London. Good luck!! 7:20 Benefactor Father This is a practice in Japan still in use today. For a family with an established business that only has daughters and no sons. It is quite common for the family to adopt a son with the intention of marrying their daughter. This is to preserve the family name in the business since in almost all cases, women take the names of their husbands and businesses usually go to the eldest son. This seems to be the case with Mamoru. It also implies Hina is from a particularly wealthy family with high social standing.