Mood: The mood of the video appears to be light-hearted and playful, with a theme of youthful romance and friendship. The presence of mathematical equations and a compass in the background suggests that the video may also touch on themes of curiosity, exploration, and learning. The overall tone seems carefree and innocent, evoking a sense of nostalgia and simplicity.

Environment: The setting of the video appears to be a school or academic environment, given the presence of mathematical equations on the wall and the casual, yet neat, attire of the two individuals. The green brick wall in the background adds a touch of urban or semi-urban setting, possibly a school or college campus. The overall setting seems informal and relaxed, with a focus on the relationship between the two main characters.