@tanukihat
No, you have a valid point, the fact that there is so many "looks young but is actually an adult" tropes in anime is pretty gross too. However, overall i think the main couple is still
less gross than the obviously not ok pedophilic relationship shown in chapter 129.
It seemed by your original comment that you thought both this couple and the pedophilic couple SHOULD be acceptable, not the other way around. Sorry if I misunderstood.