Midori no Hibi, Nanaka 6/17 Recommendations
Both females of both shows had a dramatic "change" that occurred to them, making them closer to the one they loved.
Both main male characters have this dilemma whether to keep the "change" that had happened or to revert them back.
Animations are pretty similar. Romance is Vanilla. Both Main male characters are bad-ass, but you can see them warm-up later because of the circumstances that happened...