Class Reunion, Again: All About Mizuho

All the ex-members of the tennis club at Sakura Junior High gather together at the class reunion party on New Years Eve. They're in their twenties now, and Mizuho is excited to finally get to see Tatsuya again, her long time secret love.

During the class reunion, they plan a ski trip. Their plan is to stay at Mizuho's mother's lodge in the hot spring resort. Unfortunately, in the midst of their stay, Muzuho's mother has taken ill. She is conflicted about what to do, should she care for her mother or finally give herself to Tatsuya?

What will she do?