Boku Wo Shirita Sugiru Shimizu-San summary:

Atago Gato is a shy and reclusive high school boy. One day, while preparing for the school festival, a cute and cheerful classmate named Shimizu Roman finds out that he is aiming to become a manga artist. Isn't that amazing? The popular girl, who seems to live in a different world from him, takes an interest in him and asks him a lot of questions he never expected! When he confesses a traumatic experience after being criticized on SNS... Shimizu-san tries to help him overcome it in a slightly strange way...? A youthful romantic comedy in which a cheerful girl and a gloomy boy struggle to make manga!(Source: AniList)