Too cute! Incredibly well-drawn, too! Kiyoteru especially looks amazing. I just think Yuki's face is a little too flat, although that might be from the position she's in.
I ship these two, but in a very specific way... Yuki is in high school, and she and Kiyoteru love each other but very quietly. Their entire romance is made up of looks and glances with deep conversation, and when she becomes old enough, they get married
(Sorry for sharing my headcanon, it just kinda slipped out...)
They were released with a teacher-student relationship. But I only consider them as a super cute loli couple. It's kind of like how I ship Doranbalt with Wendy from Fairy Tail. :3 Btw, PEWDIEPIE!!!!! <3