He decides to watch Ena, the yang gal in his class, who is rumored to be the opposite of himself as a yin boy, a hundred slayers and experienced in his own right, study! She is the opposite of shady. The relationship was supposed to end when the test was over, but she promised to do something naughty for me as a "thank you"! However, contrary to rumors, she is actually an inexperienced and single-minded girl... A pure love story of youth sent with fresh and exciting sex.