Arata Kaizaki is 27-years-old and unemployed. He quit his prior job after working for the company for 3 months. Arata Kaizaki decides to take part in a research program. He takes medication that makes him look younger and he is to attend high school for a year. There, he falls in love with female high school student Chizuru Hishiro.

• C&I entertainment
• dentsu
• Taishi Nakagawa
• Yuna Taira
• Mahiro Takasugi
• Elaiza Ikeda
• Sae Okazaki
• Yudai Chiba
• Mikako Ichikawa
• Natsuna Watanabe