I was close to not like this at all, because that blackmailing of the teacher was a cliche to be found out way later and cause misunderstandings (usually when the MC is in love and doesn't want to lie anymore) but ... the lonely girl found out right away, so that's a plus!
Now... We need to fix that mc who doesn't have confidence, I mean, she already has the ability to get in any university and doesn't need anyone's help... It would be great if a new love interest shows up, one who likes her honestly and they end up together.