Hand Friend

Chapter 8.5: Natsuki's Household
Chapter 8: Let's Hold Hands
Chapter 9: Natsuki's Story
Chapter 8: Let's Hold Hands
Chapter 9: Natsuki's Story
Kagura already has a girlfriend. But Hosoya, the girl who sits next to Kagura, offers him a "tefure" relationship. What kind of relationship is this?