I agree, because I had a lot of events that were not in the walkthrough. For example it says that after the first period of class, you can go see Abbie in the library, talk to her, then leave, go to the playground, then do all the events that have a "!"
It is said that after 3 finished events, the bell rings, but after Abbie, once in the playground, I have the choice between helping the girl or helping the others to make the wall, because no matter if I choose one of the events, the bell rings just after, in the end I can only talk to Abbie and do only one event in the playground, the bell preventing me from doing the last one
And yes I followed the one from f96zonetrooper.