Replaying without replaying

I saw someone ask the question about when they will have sex. Honestly, when I read a yaoi manga without sex.. I go through stages. First I have to understand the manga. Second, I have to actually ship the seme and uke. Third, there has to be some plot in which I will still ship the two. Fourth, I have to really like the manga to make it really far into it on just romance. Fifthly, I then, and only then, want them to have sex. Because While I love romance; I'm a pervert. And while there are a lot of mangas out there that have sex. A manga (yaoi manga) that actually builds the plot (or characters) up is the best to have at least a sex scene. I mean. I think about it. However with this manga. I'm still on the first stage. I'm totally lost with what is happening. Like All these time skips make it hard for me to ship them enough to actually want sex. I just don't see it happening. I'm just reading because I like vampires. The sister is cute. Almost reminds me of Shiro from Deadman Wonderland.