REACH x Thermae Romae: Pietrada no Kekkon is a single-episode comedy special from 2014 set in the Thermae Romae world. The short was produced as a tie-in with the toothbrush brand REACH to mark the release of the second live-action Thermae Romae film. It also served as part of a promotional campaign for the Otome Joshi no Tame no Anime Shinsho book line.