I like these two a lot, and that's coming from someone who normally isn't about the het gender bender couples. (last one I remember really liking Megu Miruku's?) I could explain what bugs me about such pairings usually and what exempts certain ones from my scrutiny, but instead I'll just say I think Yuu is great and I'm rooting for these two.
EDIT: I'll just sum up my position with "when you're still trying to figure who you are and who you've become, that isn't a good time for romance". I actually feel that way a bit about some yuri gender bend couples too if I'm being honest but yuri tends to usually be more subtly written. Anyways Yuu seems pretty happy with who they are and who they get to be, so all's good!