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There aren't a lot of heartwarming moments in this horror story, but they're there, and they're sweet.
At one point after Tom and Ruby reunite, players told Ruby to hug Tom. She did, and "Tom took it a step further" by kissing her! Granted, Ruby was too surprised to return the gesture, which left Tom kinda heartbroken, but it really was a sweet moment nonetheless.
When Ruby left Stitches the group photo of all of them from before the infection spread/cure was introduced. It was enough to motivate Stitches into saving Tom, thereby preventing his Heroic Sacrifice and ensuring a Happy Ending.
/tg/ deciding they have to SAVE THE EMOBIRD, Jay, even though there wasn't really a reason to do so. The fact that Weaver didn't expect it in the slightest makes it even sweeter.