- The story is just perfect the way they are, IS's plot is so different from many xianxia dramas so I see nth is wrong with the plot but the only problem I have with the script & scriptwriters is that why the romance is so little between YY & YD? I'm not satisfied of how we only get to see sweet moments rarely in every ep.

- They have YZ & CY as their main leads so definitely the acting is 100% amazing. They had portrayed their roles perfectly, I can't imagine YY & YD being played by other actors & actresses. All the casts and crews' hardworking is something we should appreciate and I pay huge respect to every cast.

- The chemistry between YZ & CY is mostly my fav, they don't have many romance scenes yet they are able to show their chemistry successfully to the audience! One of the reasons why IS has won my heart!

- The original soundtracks are so good, my fav is the opening theme song. The lyrics is just made for IS only, love how they include the storyline and plot in the song. Like how each song describe each character (mostly YY & YD)'s love for each other, the responsibilities they held and how they wish they could tell them, they include everything in the OSTs.

- I will definitely re-watch again & again as I've never felt bored when watching IS so I would like to recommend to all of u guys to try watching for like 6-10 eps at least.