Nagomi Kyuuketsuki no Kogomi-san

First love is a warm-hearted, but a little bit dangerous vampire! Shion is a university student who has come to repay the kindness of a beautiful woman who rescued him from a lost mountain when he was a child. He is reunited with her, but she is still the same as she used to be?..

https://www.cmoa.jp/title/332073/