HMN-507 Haraguchi finds himself on a business trip with Kitano Mina, a formidable and stunning boss whom he fears. The trip becomes interesting when they are assigned to share a room, and Kitano Mina starts consuming alcohol. Under the influence, she begins to express her emotions and loneliness, and Haraguchi sees a chance to make advance towards her. Quite a challenging situation for Haraguchi, considering the caliber of Mina Kitano and his premature ejaculation problems…