Sennen no Yuki, Mitsu-aji Blood Recommendations
Vampires and issues surrounding whether living for eternity is worth it or not. Female lead trying to convince the male protagonist that living in the present is important as well.
This story also features a female human and male vampire leads. It covers a little more of the idea of what eternal life truly means as well as the possible consequences of human-vampire interactions. This story also features more supernatural beings and a larger cast of (named) side characters.