Looking for a shounen-ai oneshot

It was probably an -end of volume extra- oneshot from a very cute shounen-ai manga (could be mild yaoi)
It had something to do with a guy who was a stationery item designer but things weren't going well for him and none of his ideas were being accepted by the boss (or the sales were low). Also he had a mechanical pencil which was given to him by his ex-boyfriend (I think it had glitter and stars on it). He then submits a new design based on that pencil and the product sells quite well.
I don't even remember if his ex came in the story.
I'm super cross with myself for not being able to remember it because sometime ago (like one year) I found it again while looking for another manga and I was like "Nah...why bookmark it when I know I'll never forget it...."
And...here I am at mercy's feet......
Hope someone can help..
Additional info: the art was pretty clean and a bit sketchy I guess (and I feel like it was a lot like Nojiko's art---but I'm not sure). Also I remember this scene of him slightly leaning on a road side pole and looking at the sky and thinking ...
His office was quite small and the setting was in a moderate and quite town (means he wasn't in any big city like Tokyo)
Thank you.