Glad to see a story about a long distance relationship not devolved into cheating or NTR for once! I really enjoyed how the couple were just going at it like rabbits.
It's not overdone, but I think this chapter has two instances of male ahegao. I've not encountered very many, and Taira Issui is very, very good at doing female ahegao. Perhaps they decided to branch out and show the male character enjoying the sex as much as his partner does.
I know it isn't the same, but video calls make long distance relationships much easier. Being able to see someone whenever you want makes phone sex way better.
My guess would be that, since he's still in college, and she is either attending school elsewhere or staying at home with her parents, he wants to wait until he's actually gotten himself a job first. Of course, since we aren't given all of the specifics of their situation, I'm assuming a great deal here. Let's just call it an 'educated guess.'
It's "Noice" to encounter a long-distance setup where both partners demonstrate "more discipline than a Shaolin Monk" in holding off their urges until they meet. Of course when they do, ... there's "No Stoppin' Dat Rockin'!"
A pleasant diversion while waiting for Taira-sensei to continue the adventures of that Ojou-sama and her Alpha-rank Manservant (specifically, the "Capricious Lady and Loyal Butler" series).