In Feudal Japan, two men have been engaging in an on-going relationship for several years. One night when they meet, one of the men, named Shiki, reveals that he has been struck down with the crimson disease and will soon die. Rather than squander the precious little time they have left, the pair makes the most of each other’s company, but when love is so strong, will death even be able to stand in the way of their romance?
Both are BL manga featuring vampires. Both also contain themes of reincarnation. Both are fairly short (though Akai Hana is the shorter of the two since it's a one shot). If you like one, you will probably like the other.