why stars come out only at night

Because that's when the sun is gone.

going to see the stars outside

stars are always there, but thou cannot see them in the light.

seeing the stars

them too. He asks if he can join her.

them too. He asks if he can join her.

smiles/yes you can join

smiles and follows her.

appears behind Yuni and looks at the stars as well.

turns/they look so pretty