Riko and Hayato both wear yukata for their date at the fireworks festival. Afterwards, they tell the group that nothing special happened at the date. Afterwards, in the dining room, he tells her to concentrate on her career instead of dating him. Meanwhile, Yuki reveals to Misaki that he saw Hayato kissing Riko off-camera before the yukata date. He speculates that they hide their real relationship from the viewers and the other housemates to protect Riko's budding career. Arman also notices that sometimes when he wakes up in the middle of the night, he would see Riko in Hayato's bed. This discrepancy makes them quest Riko and Hayato on the status of their relationship.
—Wikipedia