This is a male reader insert but if you're a female then make a male name for yourself~
I find it weird that on the day he registered he went straight to class and the teacher was even informed that he was coming.
In Japan you start High school at age 16 (maybe 15) and in other places around 14-15, also why so short? just wondering.
You don't start high school at the age of 12 it's normally 14 13 at the least
12?? I must be a genius! Otherwise you must mean Junior high
You're still taller than me.... T-T
Grammar? Where's the grammar? Also tip: use punctuation marks instead of continuing the sentence with 'and'