Rin wants to change the world and Sousuke wants to ensure that Rin can accomplish his goal without any interference.
Wow! This is a great doujinshi! We all know what to usually expect from yaoi manga, it's one of the things that made us love it in the first place, but I have to admit that it was refreshing to read one that has a solid, well-thought out plot. Rin is great as a military leader who wants to make the world a better place, and Sousuke is the strong, silent partner who always supports and encourages his best friend.
This definitely a wonderful doujinshi to read if you have the opportunity!
Read I Swear here.