Ugetsudou Antique
Ch5.5, he and his shop only appears in the rain. Needs uke to have his baby to be free. Uke agrees. Fall in love, almost die for each other and seme freed. End?
Monster and the Beast
Ch24 Uke saved by beast seme. Seme follows him around is ukes shadow, seeing the world etc, havings chats, stuff he couldnt do before as everyone is scared of him. Uke isnt scared, but uke a bit slutty. Seme upset when uke sleeps around, can smell others on him. One day they get separated, uke waits for seme and seme finds a way back across the sea. Aw. Uke and seme now doung sexytimes, uke basically says yes you appear ugly but inside youre not. Seme trying to 'control' the size of his dick so they can be sizably compatable lol. History of uke being revealed slowly, may have been a research experiment? Guy from palace trying to find him, as they think he was responsible for destroying the minds of the kingdom in the past.. was it him, or an older person who looked like him? Child was also there, which may have been uke? Yep, he tells his story- he was an experiment, made out of his corpse with powers to charm and break minds. He was kept, abused etc, but only escaped when they tried to starve him and mind broke king etc coz they tried to kill him. He just wanted to enjoy life, and he has since. No longer being chased. He and cavo told each other theyre in love. Cute.
Tale of the Yellow Dragon
Uke is the 26th iteration of himself, seme keeps going back in time as the dragon/god of his realm to have uke as his emperor and lover. But uke fated to die, which seme thwarts and sacrifices to protect him against each time being separated. Until this one, uke saves him, has to live out his life, no regrets etc, seme waits for him as he gets older and passes away, back into his younger self reuniting with seme.
What's with this strange dream?!
Uke is a shaman, seme applies for assist job. Dream demons etc gets uke horny and dreaming of seme, seme helping him in various smutty dreams. Uke acts cold/reserved, seme cant help attraction still and they grow close working together. Uke finally about to admit his love, but demon entwines w semes memories and uke has to cause amnesia for seme. Uke tries to be distant but seme curious about their relo, eventually remembers but hurt so good angst in the meantime.
Monster In The Mist
Post apocalypse world; uke is a researcher who with his best friend is trying to get from slum to safety with other lower class citizens, saving people and fighting zombies. Uke had a crush on seme who was infected with a related prev virus and he soon finds out is infected with this one too and is half human half zombie due to antibodies of the first virus. Works to make a vaccine, cure, various politics and working with radicals and against/also with seme to save the world. Shounen ai until the specials which has some yaoi (a bit underwhelming, and realised due to tthe comments.. seme never came?? Wut). Fave due to unique and very immersive action packed story.
Cold-Blooded Beast
Seme is born a SNAKE. So good. He one day was able to become human, met uke in prev life, ill fated love tho - seme was supposed to eat him to ascend as a dragon but refused to - led to bad luck and uke died. Uke wished to meet seme again. Seme wished for uke to have a normal afterlife and sacrificed years of pain etc for it. Then uke reborn, meets seme as his boss. We dont know until later, but seme has been watching over uke since he was a child to protect ag his awful luck (born to horrid parents, abandoned, etc - seme arranged him to be adopted by a nice lady). Uke grows up great but lonely, then seme wonders if uke would fall for seme if he entered his life as a stranger - he does. However bad luck putting uke life at risk etc, seme decides to 'die' as a human and removes himself from uke life. Uke very upset. Eventually seme loses memories in accident, comes before uke as a snake and then turns human - uke shocked to see his dead ex is a snake and alive, takes him home to care for him. Snake has no memories, uke teaching how to do everything, very cute and also naughty... Then gets memories back, they work on a solution together - snake to eat and then regurgitate uke, and all ends well.
Toumei ni Kuchizuke