In recent years, virtual reality (VR) technology has made remarkable progress, including the development of many devices and contents for such systems. VR contents that offer unknown experiences are especially entertaining when they incorporate actual feelings, for example, heat and cold. In this report, we describe the development of an interactive system through which players experience fire and ice from their hands using a Peltier device in VR space from a head-mounted display. ECG levels suggest that this new experience is exciting for players who felt excited during the unknown experience of our contents. SDNNs and RRVs of ECGs might be appropriate indexes of feelings of excitement for unknown experiences using VR.