Can anyone help me find this BL?

I’m looking for a Yaoi manga, and Google isn’t much help. From what I remember the plot is in high school, and a boy is dared by his friends to ask out a popular guy from their grade who despite being confessed to multiple times has never had a girlfriend, resulting in them joking he’s gay. The popular guy rejects his confession but wishes him luck but the theory that he’s gay is true. After this they become friends, and the boy, not knowing popular dudes sexuality, vows to help him find what gets him off which results in them having a strange relationship where they help each other masturbate... it sounds kind of bizarre but I remember it being really sweet and wanted to re read it, I’ll be really thankful if someone can help me find it again!