Dead-Teen Hero is a Manga/Manhwa/Manhua in english language, Comedy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Dead-Teen Hero manga, The 3 Strongest High School Heroes on Earth ; ; 3Can she be the main character? High school senior Jihyeon Han wants to be the heroine of a teen comic but every application has been rejected. Desparate and running out of options, she takes a chance at a once in a lifetime opportunity to prove herself. Can she finally be the main character for once? The 3 Strongest High School Heroes on Earth Dead-Teen Hero 我在漫画世界当女主 지상최강고3히어로