
If you have read the new world manga, there's a grandpa there with angel, this is their story,.

https://www.mangago.zone/read-manga/new_world_lovetopia/
Here you go! Enjoy

I hope the author won't draw something like "kana actually like naho and he spew shit about naho being average is because he didn't want anyone else besides him to notice naho's cuteness" so some shit like that.
And also I think mc is strong, I mean if I have been told all my life that I'm cute and I'm kinda brag about it, and the same person who told me that tell others that I'm average, is either i cry or dead coz of embarrassment.

ML could just leave Mc alone but nope, he went around the block and catch up with him on the other side, he could just go back home after making sure that mc is OK, but nope, he drive him back home( ◜‿◝ )♡, yup, thats yellow flag I'm seeing.
At least ML directly told mc his feeling and mc didn't have any expectations, no expectations, no disappointment, IMO, ml did the right thing. 。◕‿◕。
The way they extract mc's blood with so much pain making the blood taste like sh*t, thats why they do the voluntary blood giving thingy.