Primary

• Mitsuki Hayase Best friend of Haruka Suzumiya
• Mitsuki Hayase In love with Takayuki Narumi

Extended

• Haruka Suzumiya Older sister of Akane Suzumiya
• Haruka Suzumiya Best friend of Mitsuki Hayase
• Takayuki Narumi In love with Mitsuki Hayase