I agree with you, tsubasa was the cliche justice character and there was practically no development, the plot was very loose, its attempt at suspense failed bad as at each turn I didn't find myself on the edge of my seat but moreso laying back waiting for the story to end and truthfully I was waiting to see how this series would end. Also the idea itself of a single person behind a screen controlling a class was a huge stretch there were many directions it could have gone in. I had hopes for the summary since it was about twins and mystery and undercover disguise but I didn't get much of that. At the beginning she didn't even try to act like her sister, what was the point of going undercover then. The ending saved it though, it packed everything together nicely but could have been better
I read this because the tags were 'strong female lead' and 'mystery' but this has been very extremely disappointing. I do not mean to offend anyone who liked this and in no means was it bad but I am extremely disappointed in this manga. The plot seemed like caste heaven and I was very excited to read this however it did not deliver. The plot is messy and character development felt weak. Though that is true I did like the art style and the extra story was really great.