Ryūichi and Kotarō Kashima are brothers. Ryūichi is in high school and Kotarō is still a toddler. After their parents are killed in a plane cra...
Special episode bundled with the 7th Blu-ray volume.
Yuuta Segawa has just started his freshman year of university. One day, his sister Yuri, who raised him after their parents died, asks him to take ...
Limited edition episode included with pre-orders for the 13th and 18th light novel volumes.
Unaired episode included in the fifth Blu-ray and fourth DVD volume.
