Primary

• Yuta Aoi Twin Brother of Hinata Aoi
• Yuta Aoi Roommate of Kaoru Hakaze
• Yuta Aoi Roommate of Nagisa Ran
• Yuta Aoi Teammate of Hinata Aoi

Extended

• Hinata Aoi Twin Brother of Yuta Aoi
• Hinata Aoi Teammate of Yuta Aoi
• Hinata Aoi Roommate of Hiiro Amagi
• Hinata Aoi Roommate of Niki Shiina
• Nagisa Ran Teammate of Ibara Saegusa
• Nagisa Ran Teammate of Hiyori Tomoe
• Nagisa Ran Childhood friend of Hiyori Tomoe
• Nagisa Ran Teammate of Jun Sazanami
• Nagisa Ran Roommate of Yuta Aoi
• Nagisa Ran Roommate of Kaoru Hakaze
• Nagisa Ran Former teammate of Eichi Tenshouin
• Nagisa Ran Former teammate of Tsumugi Aoba