After the school trip, everyone's mind is filled with thoughts of winter vacation. Masahiro, who wants to have fun during the winter break, receives an invitation to go to a pension with everyone from Narashino. When wondering what they would do there... it turns out that Masahiro will have her first part-time job! It's her first winter vacation spent with everyone, and her first experience of working part-time. There are still many fun and wonderful things waiting to be discovered.