Myouenji is a big guy, yet is often teased by his schoolmates because he’s shy and quiet. Even though he’s like that, (sort of) forcing himself to Kuroda was something. Kuroda’s a rather violent guy who’s very well respected. He’s cool for someone small. I guess it’s a must for guys who aren’t gifted with ‘height’ to learn some self-defense. XD; Plus points to the girls and, yeah, you earn respect instead of being teased.
Kuroda liking Myouenji is a mystery. Is that because he’s strong enough he doesn’t need someone who can protect him? Oh well, Myouenji can get cute being such a clumsy guy.
Masaki is another mystery. I was thinking he’s the Dad (who hasn’t aged), but unlikely if Kuroda calls him just ‘Masaki.’ A guardian whose Kuroda’s feelings for tops Myouenji? 
Poor Myouenji even though he’s become boyfriend-boyfriend with Kuroda.I rarely encounter such characters in the genre. I find the story rather cute.
One great read to get my interest in yaoi or shounen-ai back.