Thank you for playing! Really glad that you and your girlfriend enjoyed It despite some grammar mistakes! Grammar is my worst enemy, I'm trying my best to fix it in my next project lol
In the second chance ending, Haruto is alive because Ichigo is so distraught with Aimi's murder and all, so Haruto escaped to Tokyo in time (I kind of recently created some sort of what-if story for Haruto, that he became a detective after this ending and is hell bent on trying to catch Ichigo in the future)
I honestly forgot that I only said that Haruto would be alive only in the ending where the MC kills Ichigo (because if I said that then don't mind my past self, it's been a while and I sort of don't remember stuff LMAOO, I'm sorry for any inconsistencies). It's definitely the only ending where Haruto and Yuzuki is alive though, yes. And you're definitely right in thinking that Haruto would be alive in the MC suicide endings as well.
But thank you for the questions and all! I hope you'll enjoy For Amerta as well whenever you decide to play it! :D