Completed BL I've already read

Yuri, one of the school's most handsome guys, and Jaerim, one of the school's ugliest, collide!...or don't they...Can't understand what's going on between these two! It's Out of Control!!

On the night of a full moon, Dokyung runs into a vampire! Haunted by the encounter, he tries to dismiss it as a dream... but not only does the vampire go to the same school as him, he begins following him around! Dokyung is horrified of course, but as time passes, he discovers some peculiar quirks about the guy: he prefers his meat well done, is scared of cats, and loves cuddles. Who is this mysterious vampire?

Sebastian Jung was the hottest teacher, that is, until Isaac Han arrived. Tall, intelligent, and beautifully brooding, Isaac has it all and Sebastian knows this all too well. In the past, they had shared a sultry after school romance. Now, Isaac is back. Can Sebastian resist falling for Isaac again or will his lips yearn for his touch?

Heesu's world revolves around Chanyoung, his best friend and crush. He doesn't mind cheering Chanyoung from the sidelines or listening to his love stories. He doesn't care if people only know him as "Chanyoung's friend." Then one day, Heesu starts hearing his name everywhere. On the bus, in the halls, during lunch turns out, there's a rumor going around school that he’s a love guru!?

Park Min Gyeom is a human with a disease called hemochrombtosis his blood absorbs too much iron, so he has to donate it regularly to stay healthy. Kim Chun Sam is a half-vampire who needs blood to live. So begins an unusual symbiotic relationship between "predator" and "prey."

Yandere
Kyuyeon has an alternate persona in an online game, he pretends to be a girl with a character named “Yorong” only to rip off items from clueless users. One of “her” diehard fans named “Yeommin” showers Kyuyeon with gifts. He’s happy but at the same time, Kyuyeon feels a bit scared by Yeommin because he’s always asking “her” for a date. To top it all off, Kyuyeon finds out that Yeommin is his classmate Kimin

Just when Yeonduk thought he was finally going to be free of his tormentor, Seo Skyler (coolest kid in school) saunters his way into the same classroom. Skyler might look blessed, but he’s got some family issues that only Yeonduk can understand. Yeonduk is more than just star-struck, though, and when Skyler starts acting nice and walking to school with him, he can’t help but hope there might finally be more between them...

Taeho’s barely scraping by after moving out of his parent’s home when he catches just the lucky break he needs: an easy job as the manager of celebrity, Wooyeon. The job starts to take a weird turn when Taeho notices that people tend to like Wooyeon a little too much... Fans are one thing, but the adoration Wooyeon ignites is something else. Meanwhile, Wooyeon can’t figure out how Taeho doesn’t adore him like everyone else.

First. First lie, first kiss, first love. When Henry and Sam first met that summer long ago, Henry learned the power of first love. But…time goes on, people part, summer ends and so too did their blink of a relationship. All but a distant memory now, when Henry and Sam gradually become close again, Henry finds himself feeling those fiery emotions for the first time since that wistful summer.

In order to repay a favor, Yu Le ended up being a scapegoat, severely insulting the school adonis Gu Yan. From the start of class, Gu Yan has been glaring at him, even until the end of the day. To get his “revenge”, Gu Yan kept finding trouble with Yu Le. Originally, it was just to teach Yu Le a lesson, but who could have expected, the "revenge" actually changed, Gu Yan felt that Yu Le was gradually pleasing to the eye, making it harder to make a move