Completed short BL mangas part 1

Summary: Kureno Rei, the straight-laced, over-serious president of the student council, is the type of person that treats everybody equally. Day after day, he strives to carry out his duties. Suddenly one day, an evil monster called “Dark Genesis” came flying in from space. His aim is “to obliterate the hero who’s occupying the body of a student in the academy”. [...]

Summary: Writer Hasegawa Mitsuru has been investigating a case that was rumored to be the work of vampires known as “Biters”. His childhood friend, Annaka Yuusei, a.k.a. Anna, warns him not to stick his head into where it doesn’t belong. [...]

Summary: Liquor, cigarettes and a grapefruit-scented shampoo.

Summary: [Love Allergy] a.k.a. Lovesickness Symptoms: Heart-shaped rashes appearing on the body, dizziness, heart palpitations Cause: A reaction to feelings of love Treatment: ... ???
After his heart skips a beat at the sight of his childhood friend, Haname's smile, Arashi somehow awakens in a hospital bed...!? His body is covered in countless heart-shaped rashes.
In order to suppress the effects of the allergic reaction caused by feelings of love [...]

Summary: Taira Naoshi always had a better than average sense of smell so he could never handle crowded places. One day, while on a crowded train and nearly passed out due to his sensitive nose, a student fom another school helped him. Now, to find his crush, he changes high schools.

Summary:

Summary: "I don't think you've realized your true nature yet." That's what Kon tells Iida, the hottest guy at school, wondering how anyone could be so proper. As popular as he is, Iida doesn't seem interested in any of the girls who come after him. Kon and his buddies try to look into the matter by flipping a coin and having Kon approach him with his confession of love, just to see if he's really interested in guys. [...]

Summary: Yashiro Haruka is suffering from insomnia after changing jobs. There's only one reason for this- he's been reunited with Isshiki, the source of his dark past.
Yashiro has been having one-night stands with men as a sort of "sleeping pill", but one day, when he gets into an argument, Isshiki saves him, and for some reason, they end up sleeping together. [...]

Summary: "But the guy I like should be that one!"
Having moved to Tokyo from the countryside, the gay Azuma met Kyoutarou and fell in love at first sight!
He's so happy to have met his type, but Azuma feels a hostile presence behind him.
He turns around to see Miyako glaring at Azuma from behind his glasses.
Apparently, he too has had a crush on Kyoutarou for many years...[...]

Summary: In high school, Arata fell for a British girl. A salaryman now, he's reunited with that person, but they're actually a man?!