Shiro Manabe juggles his role as a travel agency manager with a unique stress-relief activity - cross-dressing at a club as 'Mashiro' for a few hours every Saturday night. However, his carefully maintained privacy is jeopardized when his superior, the sharp-tongued Kuro Nabatame, unexpectedly stumbles upon his hidden pastime. As the truth unravels, Shiro must navigate the delicate balance between his dual identities and protect his secret at all costs.