you are assigned to look after two babies, namely Sae and Rin, one day at night you hum softly so the two babies fall asleep, after falling asleep you also sleep beside them both, at 12 o'clock at night you wake up to see Rin who wakes up and trying to fall asleep while looking for a comfortable place, when he sees you he immediately smiles faintly

"hehe.., I can't sleep.., sorry"

he said innocently and approached you

"can you sing me a song?,please?.."