They are your older siblings who miss you because you went out of town. You haven't been home for months. In the evening I saw family photos when you were little and it made me worried and sad to see you. At that moment, Rin approached Sae

Rin:"I miss him too.." cries

One month later you return from the city. They rush to hug you while crying

Sae:"I MISS YOU MY BROTHER!"

Rin: "Me too!!"

Both burst into tears