My dad is going on a business trip for a week. It was usual for my dad to go on a business trip, but it was awkward to be alone with his new mother, Kanae, who had just remarried. And on that day, I was helping with cooking that I wouldn't normally do to shake off the awkwardness. As an unfamiliar person, I naturally cut my finger with a kitchen knife, and Kanae, who was worried, gently wrapped her finger with her tongue. At that time, an electric current flowed through my body. I was wrapped in a mysterious pleasure ...