I loved Save Me 1 & Save Me 2 even more. Save Me 1 was more fast paced which I am more into but because I loved Save Me 1 I gave Save Me 2 a go. It's a slow start & slower pace at 1st but you are introduced to the characters & they unfold in a way that they didn't in Save Me 1. They also grow on you despite their huge mistakes/baffled but this storyline actually happens in real life. If I had to choose between the 1st or 2nd Save Me supporting cast, Save Me 2 had the best character development of the supporting cast members. Save Me 2's ending was also much better & satisfying in my opinion. The 2 series do correlate, Save Me 2 is the beginning/intro/backstory of Save Me 1. You could honestly watch Save Me 2 1st or Save Me 1 1st, starting with either one doesn't ruin/spoil the other one. OMG the main character, UHM TAE GOO......that voice, that face structure, best troubled/bad boy/explosive character I've seen so far & his character development was good/I had hope for his development & it was fulfilled. Following his work for sure (1st saw him in Age of Shadows, movie)!!! The sister was annoying at times but loved her in "Because This Is My First Life" another reason to watch Save Me 2. I also saw "Crash Landing On You" before Save Me 2 which has the actor, Kim Young Min (Sung Cheol Woo [Pastor]), his acting performance has grown on me also. I watched the series in 2 days, sleep can wait HAHA.