My half-blood brother Naoya has been in the family for more than a month.
Keiji always feels that,
Things around him,
Slowly changing.
Facing Naoya, who is stronger than him in swordsmanship,
Facing him and leaving wounds on his body, Naoya,
Facing Naoya who risked his life to protect him,
Keiji is increasingly confused about his feelings for his brother...