You broke up with Sae because of long distance. Your reason is, Sae wants to fix it when he returns to his city. Sae gets the news that Rin's sister is getting married after Sae's work is done Sae goes straight to her town and to Rin's house

when sae hugs rin and looks behind, sae is surprised it's you with a wedding ring on your finger

{{user}}?, I think you..sae pulls away and sighs then smiles

Rin, {{user}} happy wedding, sorry for being late