hello! can someone pls tell me the correct order of how to read the doukyuseii manga?

Sorry I don't know the order but I am replying because I want to know tooooo . The movie was really good and funny but I haven't read the manga just because I don't know the order

Doukyuusei
Sotsugyousei
Sora to Hara
Occupation to Beloved
Graduation Certificate
Blanc

Copying from elsewhere:

1.Doukyuusei
2.Sotsugyousei
3.Doukyuusei & Sotsugyousei Fanbook (includes a Side Story)
4.Occupation to Beloved
5.Graduation Certificate
6.blanc

And then there is also Sora to Hara, which is a side story involving the teacher in Doukyuusei. Not entirely sure when it is set, but I think after Sotsugyousei.