Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha is the prologue to the third Durarara!! light novel.
The books open with an unknown narrator asking Izaya Orihara whether he is capable of killing humans, considering how he loves them so much. He concludes that Izaya can only ever wave his knife around without any killing intent and that he is so cowardly and pathetic that it's hilarious.
Elsewhere, Setton enters the chatroom to see TarouTanaka laughing. When she is told to look at the chat history to see why, Kanra uses his admin rights to delete the history. The topic moves onto Shizuo Heiwajima, until Saika joins the conversation. As she is new to the internet and lacks self-confidence, she mostly only apologizes before leaving for the night. Setton reminds the remaining online members to be aware of the increasing amount of armed muggers in the streets of Ikebukuro, and Kanra comments that Ikebukuro has never been safe. Once Setton leaves for a night job, TarouTanaka and Kanra discusses Saika's relationship to the slasher via private mode. While TarouTanaka believes that Saika was probably a victim to the virus slasher may have created, explaining the weird messages from before, Kanra suggests the possibility that Saika is the Slasher. The prologue ends with Kanra returning to the topic of Shizuo Heiwajima and stating that depending on the method, it is possible to kill him. TarouTanaka warns Kanra not to involve the Dollars.
- "Let me ask you, Izaya Orihara. Are you capable of killing people? Can you truly do it with your own two hands? Even if you wave around that knife of yours, it's still not to the point of death and there's never any killing intent. Well, in the end, you can only ever use people, isn't that right? You really are a despicable and cowardly guy, so much that it's laughable. Haha. Hahaha. HAHAHAHAHAHAHAHAHA."