Uh oh I kinda suspect that seme is warning that healer not to heal uke's leg injury
If you don't want to know a spoiler, ignore me c:
I just wanted to share what I skimmed over in the raws for ya so....
Yeah...
Seme didn't want his Esper to go into any gates to the point he made a deal with the association that they'd make sure he couldn't go into any gate which they agree with besides any S Rank gate that would need him to appear. Which surprise does happen, so Seme ends up having to let the Healer heal the old injury xD
They get into the smut in the chapter after this next one so chapter 4, and goodness they get it on so many times in a few chapters, lol.
Seme is just super possessive of his hero Esper, very possessive.
Honestly ML look is kinda disappointing comparing to the novel