The tag alias #64255 leex -> yukaran_nosuke has been approved.
Reason: They're the same artist, according to Danbooru:
https://danbooru.donmai.us/artists/48911
https://danbooru.donmai.us/artists/44267
Also they passed away in 2021. Rest in F.
EDIT: The tag alias leex -> yukaran_nosuke (forum #379485) has been approved by @slyroon.
Updated by auto moderator