Neko running away with Shiro, seemingly as if she only cares about his safety and leaves Kuroh to face his fate with SCEPTER-4, but then later conjuring an illusion of Shiro and a fake Sword of Damocles in the stadium to distract Munakata so that Kuroh can also escape.
Neko and Shiro's first meeting. It turns out that Shiro seems to have been the first person to actually be nice at all to Neko for a long time, if ever. Once Shiro shows that he's not a threat and tries to reach out to Neko, she leaps right into his arms purring. And judging by the first episode, they were inseparable since then.
Fushimi defending Seri and later standing protectively in front of other members of Scepter4. It's a sweet sign that despite his general jerkassery (and personal history), he really does care for his comrades)
After the credits, when HOMRA joins back up with Mikoto, and Anna returns to be his side. They all walk off together, with a brief shot of Anna holding Mikoto's hand.
There are some very sweet moments between Mikoto and Anna. Mikoto lying around on the ruins of a structure he destroyed in Ashinaka. Anna tries to climb up to where Mikoto is, falls, but is caught by Mikoto just in time. He picks her up from behind the neck, like a kitten and then creates a red bubble to keep Anna warm.
At the end , Neko, Shiro, and Kuro have to leave their bombed-out dorm room to take names and rescue their friends. Kuro decides to help them of his own volition, instead of asking for orders from his dead master. Neko, despite clearly being afraid of leaving their home behind, comes as well. As they leave, Neko quietly bids their room farewell.
The talk between Mikoto and Reishi. Especially when Reishi said his reason for coming there is to "see a friend".
Shiro asking Neko if she will be his first clansman. She says he's stupid for asking because she's always been his.
Shiro talking to the Gold King, Kokujoji, one final time in decades, before he leaves.
K Radio Drama 8: Fushimi seeing Anna stuck between two vending machines, and tried to help out, even though he was unable to do anything about it in the end.