I can totally see her not getting any Valentine's chocolate. Remember, it was established in the first two chapters that Hiiragi had no idea who Tomikawa was. Adding to that, Tomikawa was also established to be wearing rather noticeable make-up and eye contacts (something that she would probably get in trouble for) but no one seemed to care.No wonder she cry so much during valentine chapter, maybe Hiiragi is the only one giving her genuine affection. There is also no way her other classmates didn't give her any chocolates, either she throw it away or just avoid/refuse because she needs more feeling pour into it.
I am afraid she might turn yandere at some points.