Tentative plot:
After the Battle of Hogwarts, Harry decided to devote himself to the research of resurrection, just to bring back those he loved deeply. Resurrection requires the contribution of life force from others. With Harry's long-term efforts, the resurrection technique he devoted himself to research has made progress, but he has also encountered setbacks. The real-looking but untouchable Sirius could be with him at Grimmauld Place, but it was a non-magical Muggle Sirius. This was a little too much for Harry to accept. At the same time, the remaining Death Eaters saw that Harry had successfully resurrected Sirius and were also trying to resurrect the Dark Lord, but they failed because they were missing one very important thing - love. The Death Eaters were still thinking of ways to kill Harry, so they poisoned Sirius with a potion, causing Sirius to wake up sometimes and sometimes be unable to control himself and want to kill Harry. This move was very vicious. After Sirius realized that he would put Harry in danger, he left...
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
