Uhmm they didn't find out each other's identity at the same time. Jigu discover it first coz of some hints and instances while MC found out way waaayyy later. But when MC discover Ji9star's real identity, he starts teasing him in-game by shamelessly calling him darling/honey coz Jigu is all blushy in rl but has a total opposite character in-game. There are also some r+19 stuffs near the end when they are already together.
I already forgot the site for korean novel but you can check these out.
1. For good translations:
https://wooksteahouse.com/variant/the-guild-member-next-door/
2. For completed epub copy, download here... but I think it is MTLed version so the translation is kinda messy. Up to you if you will read it or not. :)
https://akionovels.wordpress.com/the-guild-member-next-door/
-download epub copy
-use epub reader app.
Ppl who've read the novel, can you tell me what their dynamics are like when they find each other's identity irl