Izumi was going to thank the guy for not getting mad at her when she heard 

[B]"IZUMI!"[/B] as her brother lunged for her causing her to use the nice guy as a shield

She saw the sheets he was hold as she basically used him as a way to avoid an enraged Taki. What she saw on the header made her pause just enough so that Taki could grab her arm a yank her from behind Kimura. 

As she stumbled into his grip Izumi said just as he started tickling her [B]TAKI! BASKETBALL![/B] she squealed

Taki stopped and looked at Kimura confused asking [B]This school has a Basketball team?[/B] 

It's as if Taki's personality has changed and his focus shifted, his fighting spirit obvious

Izumi's bag provides a clue as to their true Identities as it has three key rings from the last three junior inter mural basketball tournaments. Then their is Izumi herself who's photogenic features seem very familiar as she looks at Kimura with a delighted smile