Devil Survivor 2/Heartwarming

Given that the world isn't doing so well, you wouldn't really expect to see too many heartwarming scenes, but anything involving Jungo and the injured cat he adopts count.
The end of Io's Fate route has her talking a child out of killing himself by letting him know that he isn't the only one who lost his family and that as long as he has people who care about him, his life isn't pointless.
Yamato isn't exactly the kind of guy who inspires this, but his Fate route has two separate instances that are rather heartwarming. At Level 3, you can introduce him to tayokai as part of an earlier promise to show him what an ordinary life is like, and he winds up enjoying it. In his Level 5 rank, a dying man gives him a piece of candy he was going to give his child, telling him with his dying words he knows Yamato is with JP's yet bears him no hatred, giving said candy to him because he wants him to have it. Yamato reveals he does have a soul when he wonders if someone like him even deserves such a simple gift, revealing that on some level, he does acknowledge how cold and distant he is to others and regrets his own inability to return empathy to others.
The Nicaea avatars have moments of this that double as Foreshadowing. If you save someone via Nicaea, both the male and female Tico are sincerely grateful you used Nicaea's services to save lives. And, when you remember they were created as digital extensions of the Anguished One's will, it should be obvious what that says about him.
One of Makoto's events has her and the protagonist stumbling upon a group of rioters who are surrounded by demons. The rioters, clearly frightened for their lives and knowing that the chances of help showing up is next to none, decide to force their way past the demons despite lacking the power to properly fight back. Why? All to protect a child that is part of the group.
In Alcor's route, Yamato reveals to the group that Alcor is a Septentrione. Despite this, the protagonist just smiles and still accepts him as a friend. The heartwarming is immediately subverted because Yamato tries to kill everyone, resulting in Alcor killing him in retaliation.