Cute guys, nice story...although one has to practice suspension of disbelief if you really want to believe a man wouldn't use his part the way nature intended for 3 whole years! That just doesn't happen in real life, lol. But yaoi is written by women so the ukes are basically stand ends for females; it's not a surprise then that the ukes in the vast majority of BL manga wouldn't phantom using their phallus for penetration ever again, because a female audience can't identify with that act... so they never reverse.
I also like how similar the couple is physically... no towering seme and girly, tiny teacup uke. They're equally manly, regardless of having different orientations, which makes it feel not stereotypical or trope-ish.