The Wallflower

Four handsome teenage boys live rent-free in a luxurious mansion on the condition that they transform their landlady's niece, Sunako Nakahara, into a proper lady. However, Sunako is a withdrawn horror enthusiast who avoids people and becomes overwhelmed by attractive faces. As the boys struggle to fulfil their unusual agreement, their attempts to change her appearance and habits lead to chaotic encounters and unexpected developments. (Summary by farhouse42)