I hear every chord as a 1-5-1-3 voicing, so I hear the chords as: 1332xx, 2443xx, 3554xx, 4665xx, 5776xx, and 6887xx. Just the same shape, moving up and down the neck. Of course, you can play the song your way, too. But I think the Ab minor should be G major.

After playing through the chords, I went back and checked the melody. In the fourth measure, I think you had the notes right, but wrote it down on the wrong string by accident. It looks like:

|--6----1----2----------|
|-----------------------|
|-----------------2--2-·|
|-----------------3--3-·|
|-----------------3--3--|
|-----------------------|

But it should be:

|--6----1---------------|
|------------2----------|
|-----------------2--2-·|
|-----------------3--3-·|
|-----------------3--3--|
|-----------------------|

Then in the fifth measure, for the third note you wrote a 3:

-----6-----9--1--13-------|
--------------------0--0--|
--3-----3-----------0--0--|
--------------------0--0--|
--------------------------|
--------------------------|

But I hear a 6, like this. Note I also moved the F up two strings because I thought it was easier to play:

-----6-----9-----13-------|
--------------------0--0--|
--3-----6-----10----0--0--|
--------------------0--0--|
--------------------------|
--------------------------|

In the tenth measure, you wrote this:

|-----8-----11-3--15----|
|--1-----4-----------2==|
|--------3-----------2==|
|--------------------2==|
|-----------------------|
|-----------------------|

I think the reason you are hearing two notes for that ---34- is because the violin section was not playing 100% together right at that point, but they're playing an Eb, so I only hear it like this:

|-----8-----11-3--15----|
|--1-----4-----------2==|
|--------------------2==|
|--------------------2==|
|-----------------------|
|-----------------------|

But I prefer to play octaves two strings apart, when I can, like this, because it is much easier. This is the same notes, but the lower octave moved to the third string:

|-----8-----11----15----|
|--------------------2==|
|--5-----8-----12----2==|
|--------------------2==|
|-----------------------|
|-----------------------|

Toward the end, you have this:

--------9--4--10----------|
--------------------2--2--|
-----3--------------2--2--|
-----3--------------2--2--|
-----1--------------------|
--------------------------|

I hear it as:

-----------4--9-----------|
--------2-----------2--2--|
-----3--------------2--2--|
-----3--------------2--2--|
-----1--------------------|
--------------------------|

Let me know if you'd like to make any changes! I'll post your tab when you respond and let me know what you'd like me to do.

Haha. Thanks. I have no problem with the mods you've made. :)

Well, I thought you might want to edit it. But I guess I can. Hehe.

Revised tab

It looks like this.

Oh I thought you already edited it beforehand. Haha.

No sorry, I was typing it all into here.. :-)

Should I post it like that?

Yeah, no problem.

Okay, here you go!

https://gametabs.net/tabs/school-days/classmate