I'm a native Korean speaker. I noticed that, whenever I say "너를 나를", my tongue directly releases from the onset ㄹ to the coda ㄹ, eliminating the ㅡ in-between. To transcribe in IPA, /ɾɯl/ assimilates into [ɾˡl̩]. That is, the tip of my tongue maintains the alveolar contact.
Though I cannot guarantee consistency of my pronunciation, this seems to happen to other onsets as well:
더블(double) [tə.bˡl̩] (My pronunciation of ㅓ is quite unclear, but that's just another detail.)
을지로 [l̩.t͜ɕi.ɾo] (It's hard to judge whether [ɯ] is present if "을" is not the first syllable, such as in "마을".)
클릭(click) [kʰˡl̩.lik̚] (The [ʰˡ] moment assimilates into one, resulting in lateral aspiration.)
흘리다 [ɬl̩.lʲi.dɐ] / 사나흘 [sɐ.nɐ.ɮl̩]
I wonder whether other Koreans do the same. Was there a study on this?