Responses
Is it
https://www.mangago.me/read-manga/regressor_instructional_manual/.
I’m not sure because the girl having red hair, but when you mentioned they both have a shrewed personality this was the one that instantly came to mind
YEAH ITS THIS!!! THXXX
I need to remember this manhwa were there were people from seoul and they had to enter some game and it started off with so many goblins and they ended up just camping somewhere and the male mc had this shrewd ahh personality but there was this girl with short red hair that had the same shrewd personality as him whom he called his soulmate, yet the manhwa felt like harem and he ended up being a guildmasyer for some blue guild and the red haired girl was some vice commander after they met after a long time. p.s. he also had some yandere mage stuck to him