Responses

If you mean about having a old person and being mostly fluffy with some nsfw:
- Koi ga Ochitara (Yaoi)
- Suki ni Nacchau yo
- Kitto Oujisama ga Nante
- Coming (from Niyama).
There's also Yuki to Matsu that I recommend a lot, there's some blood (samurai themes) but it's mostly a slice of life of a couple until they grow old together and it's 3 volumes so you have plenty to binge read.
Can someone suggest similar mangas?