Read Kanojo ga Iru no ni, Betsu no Onnanoko ni Kokuhaku Sareta Manga:
A story from the creator of Aho Girl, and Mangaka-san to Assistant-san. High school boy Naoya gets a confession from Tomomi, a cute and friendly girl. However, Naoya already has a girlfriend, Saki... but Tomomi is too good a catch to let go. Tomomi and Naoya's goal becomes clear: convince Saki to accept being an item with the two of them. Will she budge?