First, the acting is great. I feel bad for all these actors for being dragged into this project.
The storylines were both bad, but I couldn't even focus on the problematic things in the second couple because of how horribly offensive (to me) the story of the step-brothers was. It's like the writer was stuck in 1995 and wanted to include all of the worst yaoi tropes possible.
I'm sad this is a part of the HIStory series. Although the earlier ones had their issues, the most recent ones were so good (Crossing The Lines, Trapped, Make Our Days Count up until the last episode) I genuinely thought we were past all these antiquated ideas and could let love be love be love. Too much to ask?
Judging by the comments section BL dramas should be judged by other standards than other LGBTQ+ media, and I agree to a point, as long as it doesn't promote and romanticize toxic behavior. Because of their popularity, BL series will likely be watched mostly by teenage girls, who might genuinely believe this is acceptable and even desirable in real life.
Overall, please give these actors a good project together, cause this one was not it.