ok, just out of curiousity, bcs i can't wait, and bcs we all know from trailers this relatively calm and sweet…
https://www.wattpad.com/1510935323-desire-chapter-1 Though there is no proper opening between the second couple and according to the novel their story revolves around misunderstanding each other and longing for each other and neither of them expresses their like for each other openly though at the end of the novel after three years Shen Wen Lang with First couple's son go to country v ( not planning to reveal much as it will spoil the fun) meets Gao Tu where he comes to know about his son ( who is around same age as first couple son) and there after through Shen Wen Lang persistent effort( he even becomes neighbour of Gao Tu ) he wins back Gao Tu and then they get together.
1 
youku has released ep 5 preview with eng subtitle.
https://chrysanthemumgarden.com/novel-tl/desire/
https://www.youtube.com/watch?v=J9m6xTh-dz0
https://www.youtube.com/watch?v=zB2-bvDpnRQ
After watching it, I have given a short review - https://veiled-echium-730.notion.site/Fangs-of-Fortune-Heartfelt-Review-20fa1fcfae738059b073f8da6d0e08a7
Fan account - https://www.instagram.com/huangxing1125/
Qiu Ding Xie - https://www.instagram.com/kipuka_qiu/
Li Pen En - https://www.instagram.com/seekyli/
Jiang Heng - https://www.instagram.com/ocean._.jiang/
Try reading the novel then
Though there is no proper opening between the second couple and according to the novel their story revolves around misunderstanding each other and longing for each other and neither of them expresses their like for each other openly though at the end of the novel after three years Shen Wen Lang with First couple's son go to country v ( not planning to reveal much as it will spoil the fun) meets Gao Tu where he comes to know about his son ( who is around same age as first couple son) and there after through Shen Wen Lang persistent effort( he even becomes neighbour of Gao Tu ) he wins back Gao Tu and then they get together.