I think this part of the story is going to show us what happened, that Ido remembers but Sejin doesn't. And all the heat cycles and crucial moments (like the r*pe, and the ab*se from Sejin's father) are going to happen just like what we saw before, but this time Sejin won't have Ido's support, which will make him suffer a lot, and will corner him more in his depression, until the moment he takes his own life... And that's where everything goes to hell, and then the story we saw before begins... In short, we are going to suffer a lot along with Sejin! :'(
I think this part of the story is going to show us what happened, that Ido remembers but Sejin doesn't. And all the heat cycles and crucial moments (like the r*pe, and the ab*se from Sejin's father) are going to happen just like what we saw before, but this time Sejin won't have Ido's support, which will make him suffer a lot, and will corner him more in his depression, until the moment he takes his own life... And that's where everything goes to hell, and then the story we saw before begins... In short, we are going to suffer a lot along with Sejin! :'(
wait sejins father raped him?
no, he just used him and basically mentally abuse him. I think they end up abandoning him.