Turning to God Only in Times of Suffering (S01E09)

As Keita attempts to focus on his studies, Ako and Riko engage in a playful rivalry to see who can assist him better. While they're alone in the room, Riko and Keita find themselves sharing some playful foot interactions under the kotatsu until Ako walks in on them. In their quest to find a good luck charm to aid Keita's studies, the sisters discover one that requires pubic hairs. After some discussion, they decide to pluck their own hairs to create the charm and present it to Keita, urging him not to peek inside. Keita takes the charm to school, leaving Ako and Riko feeling a mix of embarrassment and excitement.