The gang try and help Polar Bear as he has trouble sleeping due to insomnia. Later, Polar Bear and Grizzly think back to their high school days, where Grizzly had a crush on a girl Grizzly named Tsukiko. After learning Tsukiko's family was moving, Grizzly helped her find her missing school badge.
partA《白熊君的失眠症》白熊最近严重失眠，为了白熊的健康，大家提供了各种各样的方法，但好像都没有效果，白熊的失眠问题真的无法解决了吗？
partB《灰熊的初恋》灰熊又一次被白熊打断冬眠，来到咖啡厅帮忙除雪。白熊和灰熊是发小，对于他们，有一个关于雪天的回忆……
