My impression is that Iori's sister is in her final year of high school since it is also Shizuku's final year. (They are in the same class together).
My assumption is they are both 1st year (assuming the author is consistent here). Because when Shizuku mentioned that it was her first time wearing uniform, Saori asked her 'what's about middle school'.
Saori has been delivering school note to Shizuku for only half of a year. So if they are in final year, Saori will likely to ask her 'what is about last two years' or something similar.
Not to mention if she didn't wear any uniform since leaving correctional facility (aka not going to school), she can't pass 1st year of high school anyway. The teacher also won't need to send Saori there every week if the student didn't even turn up in the last 2 years
Hence here I calls shotgun on Minami being 16 and only faked her ID so she can work in the bar
last edited at Jan 14, 2019 12:41AM