Sayo has been working at a high-end hotel as a concierge, but due to some complicated circumstances also deals with some difficult work in a night club as well. One day, a younger yakuza leader from the Suou Clan by the name of Taki Kasai checks in to his booking for the suite room... and would change Sayo's life forever. After seeing how Sayo is unmoved by his Yakuza presence, holding firm and treating him like any other guest, it becomes clear that she's different from other women to Taki, and he begins to stay more regularly in the suite room. At the same time, Sayo begins to notice that the man who she thought was just some terrible Yakuza is actually sort of charming... perhaps even sweet...

https://www.cmoa.jp/title/302116/