The only one to survive and time travel

After the war when mukuro went to check on his vongola famiglia, he finds that everywhere he walks, people, allies and enemies alike are dead. Beginning to worry about his vongola famiglia, he hurries off to find them. When he finally stumbles across his vongola famiglia, they are already gone..except lambo and tsuna. But they are dying, one from poison and the other from his injuries..

He has to make a decision quick if he wants to save either of them...But unfortunately he wasn't able to save either of them, because of the poison and injury they had. He was not really a healer, but after this when he could have saved them if he could heal. He is now determined to learn how to heal.

He waits for the day when lambo's younger self hit's him with the Bazooka so he could warn his vongola famiglia younger selves...

After doing that he ends up time traveling before he warns them and meets himself of the future, though he is still mukuro of that time, he now has the memories of his future self...

what will happen next i wonder? well it can only be anyone's guess...