Primary

• Chinami Kogasaka Sister of You Kogasaka
• Chinami Kogasaka Best friend of Suzuha Aoi

Extended

• Suzuha Aoi Sister of Isuzu Aoi
• Suzuha Aoi Best friend of Chinami Kogasaka
• You Kogasaka Older Brother of Chinami Kogasaka
• You Kogasaka Childhood friend of Yume Ototsu