Can you help me identify this manga?

[Hoshime]

Hello Everyone! It's my first question here, I need your help finding one yaoi I've read some time ago. I don't remember much, but here it goes: it was about school boys, there was astronomy club and I think the uke would come there although he wasn't a member (or something like that). And I remember that after confessing their love to each other they made love under a starry night sky. Please help me find the title of this manga.