Even Jinx doesn't have any "straight" scenes. The characters aren't perfect, I know, but they are going through emotional and behavioral changes. Jaekyung started to have a soft spot for the small, helpless Dan. Compared to Anastasia, Jinx and Painter of the Night are far more memorable
It's insecurity. These people have lost their everloving minds. They know they are in the wrong, they are angry about that, and take it out in our online encounters to make themselves feel better
I agree that these Yaoi don't have straight scenes. Both Seungho and JK are gay, and like I told, BL authors know well what pleases and what will displease the yaoi readers; they're not suicidal nor masochist.
TBH I really like the concept of Codename Anastasia and while I like also POTN for the historical and master-painter concept, I think Codename Anastasia has the potential to be such a big hit. But it isn't, for the very reasons we both know. Some readers have dropped it, guess for what.
Jinx, sorry to say, but has a cliché plot (to me) that leaves me neutral about it. Its strong points is the art and the author being the one who made BJ Alex.
I wouldn't be bothered by the straight sex if these were kept to a minimal, and not 4 chapters with focuse on the private parts.

Can someone tell me what happens in the novel please