Everwhite is an innovative multi-user XR sports platform that utilizes custom-developed thermal and haptic devices to simulate team-based snowball fighting. While existing home training solutions like Zwift and Nintendo RingFit have achieved success, they often face limitations such as high installation costs, lack of haptic feedback, or solitary, unidirectional interaction patterns. Everwhite addresses these challenges by employing an IMU-based locomotion system that enables free movement and fosters social bonding through dynamic team gameplay. A core feature of the system is its proprietary thermal interface, which applies advanced thermal modeling and a multi-user heat exchange algorithm to deliver realistic temperature feedback. By integrating real-time social interaction with immersive physical feedback, Everwhite enhances both the gaming experience and exercise efficiency, presenting a new paradigm for the Home Training and Social XR sectors.