An explosion happens in the dojo Shou went to before.
Shou, who was taking a break from school, happened to meet the "brother next door" there, Kimura Kaoru, who he had learned kendo together with.
Shou was happy to see "Kaoru-san" again, whom he longed after in olden days. But Kaoru...---

Shou caught a cold.
Is the cold medicine that Kai made for him suddenly making him grow dog ears?!
There is a quarrel between the brothers, a long desired reunion, and a story with a comedic touch unfolds on the stage of Yuusei Academy.
This is an addition to the original story of Angel's Feather.