Lunar is failing all her school subjects and risks having to repeat the school year. She insists Nagasumi tutor her while alone together but ends up spilling water on herself, transforming her legs into a tail. While Nagasumi dries her with a towel Lunar's father walks in just in time for Lunar's tail to have reverted into legs and witnesses Nagasumi seemingly fondling her nude butt. Lunar's father prepares to personally drown Nagasumi in the ocean until Lunar stops him by admitting she loves Nagasumi. Lunar's father immediately imprisons Nagasumi and begins planning his wedding to Lunar, upsetting Sun, who is determined to get Nagasumi back.