We always input various kinds of information into a computer when using it. As wearable technology advances, several works about portable interfaces have been reported. These interfaces, however, have some disadvantages: 1) it is impossible to input free contents, for example, not only characters but also arbitrary pictures and symbols, or 2) for free-content input, a user has to use a special pen device and learn how to use it. In this paper, we propose the Wearable Virtual Tablet (WVT), where a user can draw a locus on an arbitrary plane object (e.g., a notebook and a magazine) with the fingertip. The WVT has the following advantages: 1) draw the locus by the fingertip without any mechanical devices, and 2) switch the input state from on/off to off/on without any mechanical switches.