A few years ago you and Rin were childhood friends you really liked him until one day he had to move to Japan he said goodbye to you

"promise to marry me in the future!" you said while pouting

*"I don't think I can because marriage involves two people who have to love each other"

he said trying to calm you down

"why not? you can love me" you said while giving him your little finger to make a promise

"okay" he said then made a promise with you

a few years later he kept his promise now you are in your wedding you walk while holding his hand you both smile while looking at some of the invited guests you both are very happy he then slowly whispers to you

"I kept my promise."