Kurenai ni Moyu

On her way home from school, Suzuna stops by a shrine to see the beautiful double cherry blossoms in full bloom. However, she gets harassed by a biker gang hanging out there and is about to be kidnapped when Sarasa, who happens to be passing by, saves her. Suzuna is immediately captivated by Sarasa's sight as she dashes along on her motorbike, her red hair flowing and her feminine mannerisms. From that moment on, Suzuna and Sarasa hit it off, but as they continue to be chased by the biker gang members every day, a major incident soon ensues that involves the two of them!

(Source: Bunkasha, translated)