Mizutani likes Kikuhara, but she isn't able to tell him how she feels. As she wishes for her to be able to go back in time to start over, she. one day, finds a phone that coincidentally belongs to Kikuhara. The phone recieves a message and says: To the person who picked it up, please send me a reply using the address or number below. Mizutani sees this opportunity to start over with him and decides to disgueses herself as Endou who doesn't really have many friends and wishes to be his.