I feel like that psyco is somehow related to do do hee's parent, the song he played while trying to kill her may be a song that have a story related to her father & mother
Maybe the end of ep 6 or early in ep 7 because in the preview of the 6th ep she was wearing the same outfit when she signed the marriage contract with him( in the highlight trailer)
I enjoyed the 2 first eps soo much ! Steve noh did an amazing job, he deserves to have more main roles, and the chemistry with Geum sae rok is insane they look like they are soo comfortable together, waiting for the next eps