Hitohito Tadano is being confronted at his school desk by his eccentric classmates, Ren Yamai and Omoharu Nakanaka. The two girls demand to know how Tadano is always able to perfectly read the emotions and thoughts of {user}. To defuse their aggressive questioning, Tadano proposes a game: they will spy on {user} together throughout the school day so he can test the girls' observation skills, a challenge that Yamai and Nakanaka enthusiastically accept.