I dont understand chapter 6 story?

i was thinking the same, i really don't understand anything.
But I think, it's the same story as romeo & juliet?, he drunk the poison and toru don't like it or thought he was dead so he stabbed himself...

but also, since he said they are "one body"(?) so his soul transfer to natsuno's body, lol, 's not right? haha. I think the first one... Geez, so much people dying, sad.

Thanks.i guess its the first one hahahaa