I've watched all the History parts, and this one really sticks out as terrible. While the very first entry dealt with a girl in a boy's body trope, this one wanted to do some time travel. The plot twists weren't surprising. What was surprising was the 180 degree change in one of the protagonists' behavior. I know a lot of BL series (even some of our favorites like Addicted) feature rape, sexual assault and non-con. But this episode glorifies it, embraces it as its title of "Obsession" and doesn't feature any character growth or realization of bad behavior. As an example, I watched this on Viki. Most of the comments were along the lines of "it's not rape if there's no penetration." If that's what you choose to focus on--how to get the accused off on a technicality rather than the harm done to the victim--then I'm afraid this episode is imparting the wrong message.

The acting was good, but not enough to make me want to rewatch this regrettable entry. I think one of the things I like about History 1/2/3 is how they take different approaches to each story and format. It's just that in this case, the risk did not pay off, at all.