First want to write about acting Kang ho soo,I guess this the name of the lead ,Korean names are little difficult to remember but anyways mr. Lead of the drama what so good , fantastic ,amazing ,I am become speechless to see his acting . He portrayed as cute,simple and soft hearted boy but still he understands what wrong is happening and his inner soul wants to correct everything by raising the voice but he started imagine that how he made realized people about their mistake by shouting and got angry but all in waking dreams but when he came to reality he remained soft hearted boy who accepted the pain and in return says nothing. He is too good . About others all were good . Last scene when they ran on green light that was cool .but I want more about the ending part . Thay had two kids so properly together they all should get screen and plus want to know then what happened to his sis ,did she got married at the very end as hers brother then had a child . Rest is good.