The mischief of the eight eyes

Piyal is a good student, one afternoon sitting by the pond thinking about his grandfather. His grandfather used to caress him very much. Not only grandpa, everyone loves him. But my grandfather's love was different. One thing about his grandfather was very surprising to him. And that is how his grandfather used to sit on the bank of the pond every afternoon as if he was upset. Petona Pial to find any suitable reason for this. He asked his mother about it but she did not say anything correct...