@winderlies there's also the possibility that she's siphoning his life, realizes what's happening, and the "enlightenment" is her deciding she has to pass on and stop hurting the one she loves. So she peacefully departs for the afterlife, he's sad that he's now alone but realizes it's for the best, and then because these sorts of stories love doing this, he ends up meeting a new girl that looks just like a living version of Sakura and he asks her out as the final curtain comes down.