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Hi based on your description that's exactly guilldmate nextdoor but heres a list with smilar plot.
https://www.mangago.zone/home/mangalist/2709924/ (list is not by me, credits to the maker)
You're so right, it was indeed "My guildmate next door" it was just later on into the story. Thank you for the help!
Does anyone know a bl manwha similar to my guildmate next door, like with the games and stuff. The one I'm looking for it has a top that likes cats, and he thinks the bottom is stalking him cuz he moved in next door. The top looks similar to the ml from (The Selfish Romance). （/TДT)/