just a suggestion but read s1 from chpt 45 to 65 (the finale of s1) because while its not about the second couple it does heavily feature them especially taehwan and alot of the events of the first few chpts in s2 are directly related to or overlapping POVs with events in that arc in s1. the arc being Taehwan Returns. so knowing his relationship with his family and dojin and seeing some of yeonwoo's reactions before hearing his version of events in s2 is also imo really helpful to the story. esp since s2 is only a few chpts in so its a good way to fill time while we wait for more s2 chpts. anyway thats just my advice.
What chapter does second couple start? Pls