Sorry for taking so long to reply!!

I sorta answered this in a comment, but I actually think Hyunjin and Jeongin will basically never interact again, at least not alone. I wanted the ending of TMS to be very awkward and unhappy/unsatisfying. My idea is that Hyunjin is not only disappointed by Jeongin cumming almost immediately but also disgusted? Like logically, it makes sense that someone who is celibate would cum quickly, but Hyunjin is young and probably his expectations for a sexual interaction with his hot, young priest involved more taboo and less realism, if that makes sense? And then Jeongin is also disgusted with himself for letting himself be swayed by his emotions and breaking his vow of celibacy (Hyunjin being only 18 is probably an additional 'wtf is wrong with me?' factor). What I mean to say is that I don't think Hyunjin would be interested in anything else with Jeongin because the first encounter differed so much from what he had most likely been imagining when he was flirting with Jeongin.

My imaginings for what happens long-term after the fic is that Hyunjin and Jeongin see each other during service, but they don't talk to make eye contact (additionally, I imagine Jeongin would have difficulty talking to or making eye contact with Hyunjin's unwitting parents). Jeongin spirals in shame of breaking his vow to god and makes a sudden announcement that he's leaving the parish. He ends up continuing to be a priest in another area and basically takes the secret of breaking his vow to his grave. That's kind of what I feel most suits the vibe of the story, you know?

Also, thank you for liking my fic (ㅅ´ ˘ `)