Humanoido 

Meet Ido Noh, a shy first-year high school student with a severe stutter that makes talking to people nearly impossible. Her life changes when she meets Se-i Ryu, a robot with a mysterious past and a quest to reclaim his lost memories. Can Ido find her voice with this unlikely friend, and will Se-i uncover the secrets of his origin? (Source: WEBTOON) Note: Includes one extra chapter.