I’m not condoning pedophilia especially the sexualization of children. However, this piece has already emphasized that the uke will wait for the seme to grow up. Also, I don’t get why you would still continue reading it if you’re so uncomfortable with the plot.
Another point I have to make is that shoujo mangas literally also have the same age-gap plotline like Hirunaka No Ryuusei. Or those japanese films that has a student-teacher relationships.
Overall, it’s a good manga that shows how societal pressure has an impact on the relationship. A point that is usually ignored in Shoujo because it is “love”.