Both romances touch on something that many other romance mangas usually ignore, or even directly go against.
Seto concluding that arbitrary requirements that need to be fulfilled to express your feelings are just that - arbitrary and have nothing to do with the actual state of your relationship. It doesn't matter if you got into the same school, got to the top of the year in exams, found a job, or anything else. The decision is purely within you.
And now, Toyoda directly telling Inuyama she has already seen and accepted his "true self". It emphasized both - that someone needs to at least accept your flaws to love all of you, and that hiding them just to start dating will not end up well. Unless you are willing to hide them forever (or at least until the end of the relationship).