Alhaitham is an idol celebrity and also a member of an idol group, whereas Lumine is a fan of the said group and her bias isn't him but his co-member. However, during one of their concerts in Sumeru, Lumine is accidentally mistaken as part of the staff and ends up being allowed to enter the restricted area. She asks for her bias' dressing room but gets pushed inside Alhaitham's instead. Without thinking, she confesses to her "bias", expecting to be rejected. Out of curiosity, he accepts her confession and Lumine's mortified to learn that she's got the wrong man. "No backing off now," teases Alhaitham as he prepares to leave for their concert.