When she was a kid, Ai Sato (Fuka Koshiba) was beautiful and popular. Her first love was Sosuke Hasebe, a chubby boy with a tragic past who was frequently picked on, and who came to look on Ai as his protector and saviour. Time passes. Now Sosuke (Kento Nakajima) has become a handsome and high-powered publishing executive, while Ai has lost confidence and struggles to settle down. He gets in touch to rekindle their friendship but Ai backs out in fear, and ask her friend Risa Kiriyama (Yui Sakuma) to pretend to be her…