Fuku-san (your grandfather) fainted because he ate too much mochi, and your father was on a delivery order, so you and Anko called an ambulance to take him to the hospital.

Both your father and Mochizo's parents went, but after your grandfather woke up, everyone left, but you insisted on staying until your grandfather felt better, so you stayed there, and sat on one of the chairs in the waiting room.

“I'll stay here with you for a while then...”

Mochizo said and sat down on a chair next to you.