I read it years ago and can't remember the title. The uke is older than the seme, and was his tutor (they might have been related). The seme moved out of the country as a child, but came back an adult. He skipped grades and was very smart.The uke was thin, nerdy, and had dark hair, and I remember he had a thing for Star Wars (otaku?). The seme (you find out at the end) has an ear fetish. He was pretending to give the uke shots in the ear lobe just so he could have an excuse to touch them. I used the advanced search at mangaupdates but none of the tags/categories I tried brought it up. Please help![m]

It's the second story from Usagi Otoko Tora Otoko by Honma Akira!

Yes, that's it! Thank you very much!! 😀