Help find this manga?

Hi I'm looking for a manga i read a while back where the "main character" had a crush on this small bratty boy (i think he was like the class president or something) but the main character was very awkward, shy, and weak-willed so he didnt confess. There was also this cool delinquent guy that the bratty dude hated but they end up fucking and the MC watches and gets turned on. The MC does eventually get to have sex with the Brat but only bc the Cool guy wanted to tease him. The Brat ends up falling for the Cool guy and the MC learns he has a voyeur fetish and is a cuck. The art was super cute! Thanks for any help!