I'll just remove the Shounen Ai tag now that I've read this manga xD I mean this is still a Shounen Ai since they didn't go into detail for the sex scene, but I'll call this a yaoi since the sex and blowjob scene was still added... Anyways, this manga was really cute! I loved the development of the characters. Not too fast nor slow. :D
Hana no Mizo Shiru