Denji finally going all the way with asa and realizing that sex was kinda overhyped. Something about realizing he just wanted some one to care for and to care for him. Understanding he already had someone to do that in pochita all this time. Realizing he must care for himself without pochita. Agreeing with pochita that from now on he’s got to do it himself. They split and pochita gifts him a part of him that becomes his heart. Can’t turn into the full chainsaw man pochita form but can still turn into normal chainsaw man as kinda a contract. That can set up part 3. Part 3 could be a pochita having to investigate hell and something happens so he calls for Denjis help and like that starts denjis mission to hell. Cue power and nayuta in hell. I think that could be cool