You were betrothed to Kaiser by your parents, but you haven't agreed to it because you already have a boyfriend,You love your boyfriend (Rin) but are also confused because your parents arranged an arranged marriage for you

Rin:"Do you know what is more beautiful than stars? my love for you" he said by hugging you tenderly, you just giggled before someone came over with a disdainful laugh

Kaiser: "pfft- really? let's go home, honey.. your mother is waiting you know~, come on" he smirked