After she was sitted in front of seo yul although she couldn't see his because they were barricaded by a flimsy cloth to hide seo yul true face.seo yul then asked gong sun if it's true she could retrieve any kind of book as she claimed In which gong sun said yes confidently boasting that there isn't a book she can't lay her hands on.
Seo yul then asked gong sun if she could help him get the books on the memorandum of the former crown Prince Lee won which left her dumbfounded.As they where talking,the mice gong sun hid under her cloth jumped out and ran towards seo yul. she immediately stood up and ran after it eventually crossing over the filmsy cloth use as a barricade to separate her and seo yul. Immediately she saw seo yul face she was mesmerized by what she saw,She was unable to believe a man could be that handsome ,she later came out of her daydream and continued chasing the mice which she later caught on seo yul as the mice had already jump on his hand.
she took it in her hand claiming the mice might likes him more seeing how it jumped away from her to go to him little did she know seo yul is very sensitive to blood because he's a vampire and in the process of jumping away from gong sun the mice has already left a cut on het hand which she didn't notice. The female servant staying with them all along noticed the change in seo yul eyes and immediately inform gong sun to leave for the day as she'll be recalled later but seo yul found a way to control himself and told her she doesn't need to leave yet.