 If you liked
Hoshi dake ga Shitteru
|
 ...then you might like
Koi ni mo Naranai.
|
Both manga revolve around a shounen ai relationship involving a gay guy and a second individual who had never felt romantic feelings towards the same sex before. The relationship in both stories progresses at a fairly realistic pace, and both manga and after a single volume, focusing on the two individuals realizing their feelings for one another but not continuing after their mutual attraction has been acknowledged.