1 - End of the world scenario. The only two survivors were a man and a woman. They're both homosexual. (I don't remember whether or not that was specifically said or if it was just heavily implied.) I'm sure this one's a oneshot.
2 - Yaoi oneshot. In the Edo period (or sometime like that) there was a rich young master who was very ill and didn't have much time left to live. There was also hos sensei, a vampire, and they were both in love. They have sex (wouldn't really be BL if they didn't xP). The vampire's got some internal monologue and I think he says/thinks something like "I'll take your ongoing time". Sick dude dies, turns out the vampire meant he'd wait for his rebirth instead of turning him into a vampire. Present day, a group of high school boys chat while walking on the street when guy A points out to guy B there's a guy looking at them from the other side of the street. Guy B finds him familiar for some reason....
3 - BL oneshot #2. MC fell in love at first sight with the beautiful person who confessed to him one day and they've been dating for a while. Eventually he found out Beautiful Person (BP) was a guy, but that didn't matter to him because he'd fallen in love at first sight, as mentioned before. Yet, BP was very unsure of their relationship because he knows the mc thought he was a girl at first and thinks they're only stll going out because since he's pretty, mc can pretend he's a girl. MC realized that BP has been avoiding him lately and I think when he was on the street with a female friend he sees BP running away from them and when they meet again later BP says the mc'd be better off with a girl, and that he wouldn't be ok with BP anymore because he'd been going through puberty and was growing taller and his voice was getting deeper and because of that, the mc wouldn't like him anymore (he wouldn't be able to pretend he was a girl). The mc told him they were breaking up and that BP should come back when he had enough confidence in himself and in the mc's love for him (at least I think he said something like this). I think there's some kind of time skip, next the mc and his girl friend are talking at school and she says something like "Oh, did you know, I heard there's this really cool 1st year/freshman entering this year" and from behind BP comes, all manly and cool and confesses for the second time to the mc, who says yes.
4 - I read a non shounen ai manga that had a short shounen ai story aswell. This was the structure, I think: first three chapters: main story; 4th chapter: part 1 of shounen ai story; chapter 5: a short unrelated story; chapter 6: part 2 of shounen ai story. (I'm not sure if the main story was 2 or 3 chapters, but this is the sturcture..)
part 1 was about a somewhat nerdy uy who was going to his high school reunion and was remembering about his first love. He used to be sort of unpopular during school and he loved to read, and he found out a popular guy in his class read the same books he did. They struck up a conversation and became fast friends. One day, during an overnight class trip, he woke up at night and saw his friend from afar, kissing a girl on the beach. That was when he realized he loved him. Fast forward to the present, he goes to the reunion, the friend and the girl are still together, they start chatting, and it turns out they hadn't been kissing that night: the guy was drunk and puking and the girl was just helping him out. That had sort of broken the ice between them, so tey started talking and dating a short while after. The chapter ends with the mc thinking to himself that despite everything, he was ok with them being together, and then the friend comes running after him, asking for their email so that they can keep in touch (as friends).
Part 2 was fom the best friend's POV. He was pretty popular and outgoing when he was in high school, and was surprised someone as gloomy as the other guy liked the same kind of books he did. So they started being friends, etc etc. As it turns out, he'd started developing feeling for the other guy long before the trip, but he was conflicted and didn't act on them. He in vited the other guy on the trip thinking he'd confess once he had an opportunity. The night he decided to confess, he got himself tipsy for courage but ended up vomiting and the girl who happened to be close by helped him (that was what his friend saw). After that, life happened, he started dating the girl, eventually started loving her, he and his friend grew distant and stopped talking eventually. Now, though they've had their troubles over the years, he's still together with the girl and he's thinking of spending the rest of his life with her (I think). Going back to the present, they meet at the class reunion, chat, etc etc, and it ends with him asking his friend for his contact information.
I know these descriptions may be a bit long (especially the last one), but they're detailed, at least. I really remember practically everything but the title, but I felt like reading them again so please help me find them
