Hi! Thank you for your interest.
A Tale of The Eagle Sword (TotES) and its spin-off Blood of the Johden (BotJ) are the original comics drawn by our illustrator Moon. They are in the process of being rebooted and as such unavailable for reading at the current time (but we do have plans for both titles).
In Her Choice, TotES and BotJ are historical TV dramas, and the characters are the cast acting in them. While they do indeed take place in the same universe, the plots are unrelated, so please enjoy Her Choice without worries ^_^
I hope this answers your question!