yea her name is actually mira. i agree it didn’t feel sexy at all which is refreshing
But it’s implied that drinking someone’s blood has deeper significance than just drinking blood. After that MC said they’re just friends even when their interactions make people think they’re dating and after Mira told him he can decide what they are now. Meaning, he “doesn’t want to put a label on it”. Typical f*ck boy behavior if you ask me. Note that he was the one who said he wanted her to suck his blood, mind you. He has a harem. It’s subtle, but still a harem nonetheless
The scene where he's alone in a room with Sitri (I get names mixed up so if I got it wrong pls correct me) didn't feel like a sexual encounter at all. I mean, it isn't, and it was never meant to be one. It felt domestic, and you could tell they trusted each other. The scene after she drank his blood was nice. Just them laying down next to each other and talking was nice. Manga like this usually shows off ero stuff, and this one has its moments, but it feels like we actually know these characters. They're not these flat npc's that barely think, lol.
This was just my opinion (づ￣ ³￣)づ