Yuri no Hajimari wa Dorei Kara

Chiyoko Hanamura, a high school student who failed to transform into a "gal" lifestyle, often skips class on the rooftop. One day, a younger student named Sakine approaches her with an anonymous love letter and asks her to reject the confession on her behalf. Wanting to help her cute kouhai and preserve her image, Chiyoko agrees to the task. She goes to deliver the rejection, unaware of who will be waiting for her.