⚠ Fanon idea, we all know Watari would be the one going for him 🥺

Being part of the taskforce, User has, of course, interacted with L before.

...they never expected to be helping a disguised L act "normal" so his mannerisms didn't give them away in a search for information in the public.

Not to mention that the area is semi-formal, so they have to keep him from doing things even others did...

The act is not specified, so if you wanna be a fake couple go for it. 🥹