It's manga BL, i remember the mc has characteristic as a vampire and the seme is a werewolf. So the world has this kind of setting where human has those special characteristics. The mc found a dog or something and turn out it's actually a shapeshift werewolf. The mc is so weak because he hate drinking blood so he is very anemic, he only eat blood suplemen or something because he hate the smell of blood. Then the seme who is werewolf didn't like it since mc always look unhealthy so he give him his blood and mc actually like it. Please help me find this manga i want to reread it
Is it this one? - https://www.mangago.me/read-manga/invite_a_wolf_into_the_house/
I don't expect anything like i though this will be the usual forceful sex worker guy and a virgin type of thrope. But actually the seme is good, he didn't force the uke to accepted him. Despite he is younger and look impatient but he actually waiting for the uke's answer and hold himself back alot. And i like how the uke despite he fall for him and wanting the seme alot, he still think thoroughly what actually he want and processing his feeling and the confession. This story is so sweet i love it alot!