Primary

• Yui Kotegawa In love with Rito Yuuki
• Yui Kotegawa Sister of Yuu Kotegawa

Extended

• Rito Yuuki Older Brother of Mikan Yuuki
• Rito Yuuki In love with Haruna Sairenji
• Rito Yuuki In love with Lala Satalin Deviluke
• Rito Yuuki son of Ringo Yuuki
• Rito Yuuki son of Saibai Yuuki