"When high school student Souji Kushiki, an academic achiever and talented athlete from a well-to-do family, returns home from boarding school, he finds that his sisters Harumi, Youko, and Saki have changed ... Souji just brushes off their odd behavior at first. However, when Souji arrives at school the next day, he learns that, during the summer, one of the students in his class was pushed to his death in front of a subway train ... two other students...

The SOS Brigade gets browbeaten into entering a baseball tournament to help their fearless leader stave off boredom. But Haruhi has no intention of losing...and she's ready to pitch a fit if her team doesn't step up to the plate!