By refusing to simply tell Tsubaki that she wanted to go to a different high school, and thereby letting her deliberately downgrade to a lesser school than the one she wanted, Hiiragi may have damaged Tsubaki's future prospects very badly out of nothing but petty spite and insecurity
FFS, Tsubaki would have go to any school as long as it was with Hiiragi.How it's Hiiragi's fault that her own sister can't stand up for herself ? If Tsubaki wanted a good university, she could have choose a good high shcool herself, she is not a damn kid. Tsubaki has damaged her future herself by wanting to follow her sister. Don't start blaming Hiiragi for that. Tsubaki is sabotaging herself here.