Kirakira to Giragira

Lulu Himeji is a beautiful girl who looks like the main character of a shoujo manga. Surrounded by friends, Lulu was leading a sparkling high school life. But due to her father's work, she has to transfer to a new school. Lulu is filled with anticipation for her new life. However, something seems strange at her new school. Her classmates look totally different from her past experience. The thick lines and the style of their faces... come from the world of hard-core gekiga manga! Lulu is happy to find her childhood friend Zen Gokurakuji is in the same class. But he, too, has been transformed! (Source: Harta, translated)