Shujinkou Ni Nari Sokoneta Ojisan, also known as The Old Man Who Failed To Become The Protagonist or 主人公になり損ねたオジサン, is a Japanese web novel that explores the concept of being overly powerful and the consequences that come with it. The story delves into the idea that being too strong can lead to the unintentional breaking of various 'flags,' adding a unique twist to the comedy and slice of life genres.