If I lose at rock-paper-scissors, I have to follow the other person’s instructions. My partner ordered me to take off my clothes and I obeyed. It felt strange when she stared at my crotch. My erect penis was pulsating. ‘This feels weird, doesn’t it?’ we both agreed as we entered the bath together.

I wanted to touch her body, but it seemed inappropriate since she was my best friend. It was as if Mei could read my mind when she asked, ‘Do you want to have sex?’ ‘I’m just curious,’ she said. ‘You don’t have to do it if you don’t want to.’ Her parents are away on a trip, and we’re alone in the house. We can do whatever we want.