Misaki Oto, who started playing the trumpet in junior high school, is an AV DEBUT. Oto-chan was a student when she was devoted to wind music, and she was jealous of her classmate who she was in love with, and regretted not being able to say anything to her senior who she liked. From now on, she decided to make her debut because she didn't want to have any regrets in her life! She falls in love with Oto-chan, who is so lewd that you can't even imagine from her naive appearance!