This is actually a very interesting idea, although I feel really sad at how Kakeru won't be able to live his life with Suguru always with him. I'm very curious at how they'll get Leonardo to help them, though I wonder how Kakeru got all those threats to begin with...? I can't seem to tell if you are saying that Suguru's a secret (that's failing) or if people are angry that Kakeru lived and not Suguru.

Hopefully will see you later! Please do continue this idea :)