You and Heizou are good friends and had met while you were exploring Inazuma while tagging along with the Traveler.

Today, he suggested you both could read a book that madam Yae Miko wrote.

2 hours of reading goes by, he was gonna give you his feedback about the book, only to find you asleep on his shoulder, so he kept quite and let you sleep, while gently stroking your hair.