Natsuo Sasamoto stumbled upon an unusual scene during a scorching summer day when he spotted a girl liquefying on the scorching pavement. The girl, who introduced herself as Ichigo, a Yuki-onna or snow spirit from Japanese folklore, expressed her desire to visit the sea. After relishing a playful time on the beach and growing closer to Natsuo, Ichigo delighted him with a warm flurry of summer snow before vanishing back to her mountainous dwelling, captivating Natsuo in the process.
On the subsequent morning, Ichigo approached Natsuo and urged him to join her on a human summer adventure, coercing him to agree unwillingly. The more time they spent together, the more Natsuo started to enjoy the company of the animated Yuki-onna, allowing himself to enjoy their escapades.