Why does it sound like the author wants to involve the senior even more? Please don't let her end up sleeping with that senior. Making the story look like a one to one romance and building up her relationship with the main male lead in Season 1, only to turn it into a love triangle where she sleeps with the senior, would be so ridiculous. The cover and all of Season 1 made it pretty clear that Gong Taesu is her one and only love interest. I hope nothing physical happens with the senior. It should be used to help her realize her true feelings instead rather than having her bounce back and forth between two guys
What makes this different from other love triangles is that the fl wasn't caught between two ml from the start. the cover and synopsis only ever point to Gong Taesu as the main ml, and their relationship has been progressing well. I really don't want this to turn into a forced love triangle, especially if she ends up sleeping with the senior because of the yang energy thing. That would completely undermine everything she and Gong Taesu have built together. ╥﹏╥