Quick opinion on the Tsubasa scene, before delving into Kirin's scene:
That being said, there was a scene that I loved to the point of crying that no one's really talking about:
And that's really the tragedy of Akira. It's just that this monologue is overshadowed by Chika later. But the point of the matter is that Akira is now dealing with everything he should have dealt with when Sekai died. He never grew up. His innocence was taken. His predator was taken. His doll was taken. He now only has a broken shell filled with regrets and the bed of worms he injected these girls with.
And that's good. Because he's finally saying these things out loud. He needs to say them out loud, even if it's a cry for someone to kill him. It's at least something. And since this event isn't missable, it's the closest we have of him outright saying these things to someone so far, that I recall (since "Stomachache" is missable).