...poor thing. T_T
For those not familiar with the series, Hiiragi's the one of the far right.
Why do you look so gloomy when you were so young?! I would have picked you up and hugged you and told you you were the cutest kid ever and you should smile and have fun while you're so young!!!
A-also, Kakeru singing Hiiragi's song? Bi Guilty? ...as in "Guilty for being Beautiful"?
...but the partial lyrics of Bi Guilty fits Hiiragi down to a t.