Blue Sky Complex
Ongoing | ichikawa kei | 2013 released
I love this manga with every fiber of my being! Ichikawa Kei (the mangaka) is an incredible artist and story teller. This particular work of her is tender, gentle, funny, and romantic. I've read this story multiple times (at least four times so far) because it never fails to move me. Please read this manga! You won't regret it! And when you get the chance, read all of Ichikawa Kei's other works as well.
Kabe no Naka no Tenshi