Oppa This Is All A Mistake summary: You are reading Oppa this is all a mistake manga, one of the most popular manga covering in Webtoons, Shoujo, Comedy, Drama genres, written by at MangaBuddy, a top manga site to offering for free. Oppa this is all a mistake has 52 translated chapters and translations of other chapters are in progress. Lets enjoy. If you want to get the updates about latest chapters, lets create an account and add Oppa this is all a mistake to your bookmark. On the day I was planning to confess to my childhood friend of ten years, I ended up stealing his brother's underwear left out to dry. His brother mistakenly thinks that I have feelings for him and goes so far as to report it to the police. Brother, it's a misunderstanding; I like your younger sibling over there!