Yes, it was a good idea to put that chapter here.
In a way, even though I thought that the others didn't help him enough (at all?) in the original timeline, I kind of understand why they didn't do anything to help him. I mean, they weren't aware about what Kakeru was going through..but in the other hand, they haven't tried to know him better, to know about his family life and all...But I guess this is how life is. We're surrounded by people who always seem to look fine when in the end, there's a lot of unexpecting things happening in their lives.
I have to admit that I was a bit shocked by the message Kakeru sent to his mom, the "Don't ruin my life" line was...too harsh...Maybe I think that because she died after that..but still...
What surprised me, was the one his mom haven't sent...I guess he felt even more guilty after that 
I guess we can't blame anyone for what happened: everyone was involved..but in the same time, they weren't. Don't know if you understand what I'm trying to say.
Anyway, that was a good chapter; It was good to see how things happened, and what was Kakeru thinking all this time.
I'm looking forward to the next chapter....another month to wait
