One night, a hotel cafe clerk named Hirasawa Momoko (played by Konishi Sakurako) met a strange man in the hotel's sky observatory. The two kissed repeatedly as if they were sucked together. Although Momoko had no experience in love, she kept pursuing the man. Not long after, she found out that he was the "perfect" elite hotel manager Hase Kei (played by Kiriyama Ren) who worked in the same hotel. Momoko could not forget the kiss that night, but Hase's cold attitude made Momoko at a loss. The sweetest and most exciting love with a mature man has begun now.