Shishihwa is a sophomore in high school and serves as the center of the popular idol group "tetra". The group is in a period of rising popularity, and it is rumored that it will debut in the mainstream in the near future, but her days as an idol are filled with an inexplicable sense of uneasiness every day. She discovered through SNS that Keita, who often participates in activities, is seriously in love with her, and she is very happy about his strong love. On the other hand, Keita is a college student who has no dreams or goals and lives a dull life every day. He is a die-hard fan of "tetra". His favorite member of the group is Shishihwa, who is the center. He loves her seriously even though he knows it can't come true. One day, a word from Keita hurt Shishihwa. She crossed the line between fans and idols and went to the place where Keita worked part-time...