This video is basically about Susumu his realtionship with his sister and Tetsu, also how he lives as a Ninja, I must warn you this video is very sad…probably my saddest video yet, i just listening to the song over and over and it really hit me how it fit the angst in ep 19 and how Susumu deals with it….for spoiler reasons i will not say the other reason for making the video…but this video does give spoilers for episode 19 of the anime.